condition at this hourful the new york police commissioner said a man wearing a gas mask took a canister out of his bag and started shooting as smoke filled the subway. i'll have much more on that in a moment. back here in ukraine. it is a rush to evacuate civilians from the eastern part of the country as clearer signs emerge that russia is ramping up its preparations for a full scale attack on the eastern region. ukraine's deputy prime minister said nearly 3,000 civilians were able to flee today from some of the city's most affected by fighting, including mariupol and bo other area. you can see outside the shipping yard. another new video posted to social media shows a large column of russian armored vehicles and trucks carrying soldiers and equipment. this was filmed inside russia right across the border from ukraine's donbas region. today the pentagon confirmed the u.s. is looking into reports that russian forces have used what may be a chemical weapon in mariupol. the military governor of the region says three people were taken to the hospital but are expected to survive. president volodymyr zelenskyy assured the world that ukrainian forces can end this siege of mariupol, but only, only if the west sends more heavy weaponry and soon. >> translator: if we get jets and more heavy artillery vehicles, we will be able to do it. but we have to agree on this. we still have to persuade. we still have to squeeze out the necessary decisions. i am sure that we will get almost everything we need but not only time is being lost. the lives of ukrainians are being lost. lives that can no longer be returned. >> let's get straight to cnn's chief international correspondent clarissa ward who is now in dnipro, ukraine. we see the russian troops aappearing to be amassing in the donbas region in the southeast corner of ukraine. what is the latest on the fighting? >> reporter: so, jake, one ukrainian local authority here has said that they expect this russian offensive now to begin any day, really. potentially even as soon as tomorrow. that following the images that you're talking about. they say that they are seeing heavy equipment now being pulled toward the front lines. the one thing this official also added, which i thought was interesting, is that something is playing in ukrainians' favor which is is that there has been heavy rains today and heavy rains are expected the next few days. that mean in principle, that those russian forces, if they were to push ahead with this offensive, would need to use roads as opposed to going through fields which would be extremely muddy. if they use the roads, that gives ukrainian forces a much better chance of defending themselves, of course, using the anti-tank missiles, the javelins that we have seen them use with great effect in other parts of the country. this, as all this is happening, the civilians in many of the areas are continuing to pay a heavy price, jake. one official saying that 60,000 people have been living in basements, in bunkers, in shelters, for a month now. there has just been relentless shelling going on in a number of towns. particularly in the city in donetsk right by the front line. it is a city of 100,000 people roughly. some 400 people have been buried in the last 40 days. and what local authorities are saying, jake, is that the morgues now in towns like this are at full capacity. they can't take any more bodies. they don't have electricity. and they are no longer able to even access their cemeteries. so they're being forced to do something similar to what we saw when we visited the northern town of chernihiv, where by they clear a wood and take a bulldozer and create these large trenches to try to bury their dead in. evacuations are ongoing but they have been thwarted somewhat by that horrific attack on the kramatorsk's railway that resulted in the deaths of 57 innocent civilians. that has meant that many ukrainians are simply too frightened to get on those trains that would ferry them to relative safety, jake. >> clarissa, civilians are starting to return to the areas in and around kyiv after russian forces with drew from that area. now president zelenskyy said the russian troops left behind not just evidence of atrocities but tens of thousands of mines? >> reporter: that's right, jake. there is a herculean effort to try to de-mine these areas. a lot of these roads are completely impassable. when we were driving just today, along the road, we saw an anti-tank mine just sitting at the side of the road. ukrainian forces are finding so many of them that literally, they're just being forced to push them to the side as they continue to look for more. and obviously, there are instances where this is resulting in catastrophic accidents. there was a case outside again that city that i mentioned before that we visited last week in chernihiv where a car basically ran over one of these mines. flipped over and was completely obliterated. and this makes it all the more difficult. because of course, if you can't use trains to evacuate people, if you can't use roads to get people to safety, or to bring people back to their homes. it becomes all the more difficult to move supplies around, to move aid in, to move people out. >> clarissa ward in dnipro. phil black is with me. the pentagon said today they're looking into these reports from ukrainians in the military, ukrainians in the government that the russians made these chemical weapons in mariupol. what do we know about this? >> so the ukrainian forces on the ground in mariupol say this weapon, whatever it was, was delivered by a drone. it dropped, it dispersed what they're calling an unknown poison and it impacted a small group of people. a handful of people. not seriously. three people needed treatment. it seems the symptoms were not serious. mostly respiratory problems, no one knows what it was. the officials say they are december fruit find out in case this is the much predicted chemical weapons escalation that has been talked about through this war. u.s. officials are talking about the knowledge they have, the information they have, which suggests that russia could use a mix of a crowd control agent and more potent chemicals. a more brutal form of tear gas. it is one theory that could explain what was experienced in mariupol. >> a top british official said all options are on the table for how the west would respond if russia does use chemical weapons in ukraine. we all recall, of course, when bashar al assad who was allied with the russians who used chemical weapons in syria. what is on the table in the west? >> that same official said it is useful to maintain ambiguity when talking about the possible response. and that's because as you point to, there is month good response. particular i in this war, too. the one true policy red line for the west in this war is ensuring there is no shooting war between nato and russia. >> during a proess conference today, vladimir putin said peace talks with ukraine hit a dead end. a ukrainian presidential adviser said the peace talks are ongoing. how do you reconcile this difference? >> putin also said he will continue his special military operation until it is successful. it certainly doesn't point to optimism in terms of diplomacy. this is taking place in the back drop. at a very low level, sub groups online. and they're essentially continuing this on the offchance, the slight chance that it could result in a breakthrough that saves some lives. and even if there's not much optimism, it is worth pursuing. >> he also said the atrocities in bucha were fake, a lay. thank you. the prosecutor general is telling cnn that her office is building more than 5,800 cases of war crimes against russia. this afternoon i spoke to wayne jordash. one of thele investigators here on the ground in places such as bucha, trying to document what truly happened. i started by asking wayne what he has seen in his multiple trips to bucha. >> well, bucha is full at the moment of investigators and prosecutors and state security, counter intelligence, all trying to investigate a range of possible war crimes, crimes against humanity. there are inspections of russian facilities which include a blood-staged detention centers, mass graves where bodies have been pulled out on a daily basis. there are buildings which are destroyed by russian artillery with no apparent military focus. so it is a massive crime scene, i would say. >> i understand investigators are also using drones to help with the investigation. how does that work? >> well, in order to investigate a scene, one of the first things you should do when you talk about a scene like bucha or many of the other towns, to try to get an overview of the town. get am overview of where the russians were based. where the war crimes or the violations of international law occurred. so having this overview is really important before then descending in to ensure preservation of the scene. a retrieval of items which might be evidence. there after, interviewing witnesses to discover what happened in those targeted places. >> not guilty governor of donetsk said russian forces around mariupol are using mobile crematoriums in order to get rid of the bodies, of the corpses of dead civilians. take listen. >> taking bodies of the dead from the streets, the dead from collapsing buildings. they're taking them out into the territory not controlled by ukraine and destroying the bodies there. >> if russia is truly doing this, destroying the bodies of ukrainians it has killed, destroying evidence, will we ever know the full extent of the crimes that russia has committed while in ukraine? >> i think we will have a good picture. i think there are many ways to build a war crimes case or a crime against humanity case or even a genocide case. witness evidence is important but so are forensics. so are as you mentioned, drones, examination of the scene. of course, if that is true, the russian government can cover up some crimes but i think it is difficult. the scenes i've seen, the sights that i've seen show increasingly the crimes were widespread and systematic. crimes against humanity. it is very difficult to hide these times of crimes. yes, some evidence may disappear but with the focus on society and international experts, much can be uncovered. >> you were telling me when you were in bucha, you saw a grave with a woman buried with her two small children. >> yeah. what is clear is that to me, at least, so far, when you look at the patterns, you have some towns where there is a huge amount of civilian destruction, of buildings. and then you have towns like bucha where the level of destruction rose to a savagery, i would say. which seems to have targeted the most vulnerable from children to women to those detained. and the purpose isn't very clear. it looks like a level of destruction for destruction's sake. no obvious military advantage. no obvious purpose. destruction seems to have been the name of that moment, the name of that game. and i think, you know, the mass graves which have been uncovered of civilians within them, including women and children, speak to that level of destruction. the narrative appears to have moved from war crimes to crimes against humanitarian humanity. and the question for all of us to ask is whether this escalation of violence turned into genocide. and i think women and children in graves speaks to that. >> we appreciate your time and we appreciate the work you do. thank you. >> thank you. thank you very much. our other big story, horror on a new york subway. a smoke bomb set off. then ten people shot. what police are saying about the man for the shooter. plus, president biden's plan announced moments ago to try to ease high gas prices in the u.s., due in part to russia's invasion in ukraine. ♪ lunchables! built to be eaten. we need to reduce plastic waste in the environment. that's why at america's beverage companies, our bottles are made to be re-made. not all plastic is the same. we're carefully designg our bottles to be 100% reclable, including the caps. so they can be turned back into material that we use to make new bottles. that completes the circle and reduces plastic waste. please help us get every bottle back. we got the house! you did! pods handles the driving. pack at your pace. store your things until you're ready. then we deliver to your new home - across town or across the country. pods, your personal moving and storage team. we gotta tell people that liberty mutual customizes car insurance so you only pay for what you need, and we gotta do it fast. [limu emu squawks] woo! new personal record, limu! only pay for what you need. ♪ liberty, liberty, liberty, liberty. ♪ i don't just play someone brainy on tv - i'm an actual neuroscientist. and i love the science behind neuriva plus. unlike ordinary memory supplements, neuriva plus fuels six key indicators of brain performance. more brain performance? yes, please! neuriva. think bigger. we turn back to the u.s. in our national lead. an urgent manhunt is underway after ten people were shot in a new york city subway station. the shooting happened around 8:24 a.m. during morning rush hour at a station in brooklyn, new york. police say the shooter exploded a device at the scene and began opening fire inside the train car as it filled with smoke. we are told the suspect was wearing a gas mask and a green construction type vest. he is black and heavy set. video from inside the subway station shows a chaotic scene as commuters scrambled to safety. smoke can be seen pouring out of train car as they exited. other videos show, one person is bleeding and helping an individual. the latest from new york city. >> reporter: panic aboard a new york city subway train in brooklyn this morning. as shots rang out and smoke filled the car, witnesses say -- >> those people screamed for medical assistance. it was just a scary moment. >> reporter: authorities swarming the scene. >> an individual on that train donned what appeared to be a gas mask. he then took a canister out of his bag and opened it. the train at that time began to fill with smoke. he then opened fire, tracking multiple people on the subway and the platform. >> reporter: ten shot with six more injured according to the fdny as photos from the scene show blood on the floor of the subway station. >> this is not being investigated as an act of terrorism at this time. we can also report that although this was a violent incident, reportedly we have no one with life threatening injuries as a result of this case. >> we were stuck in the train, about to reach the stop. and then thank goodness, the train moved within a minute. or i don't know what would have happened if we were stuck there for longer. >> reporter: the attack leading to a massive manhunt in the city with the suspect still on the loose. >> he is being reported as a male black, approximately 5'5" with a heavy build. he was wearing a green construction type vest and a hudlered sweatshirt. the color is gray. >> reporter: a gun, multiple power magazines, a gun and gunpowder were reported there, and they believe the gun jammed during the shooting. the new york mayor who is in isolation recovering from covid-19, telling cnn, it is too early to dismiss the subway attack as not terror related. >> this is terror of someone who attempted to terrorize our system. they brought in what appears to be some form of smoke device. they discharged their weapon. so i don't want to be premature in identifying that this was or was not. i think at this time the investigators are going to do their due diligence to properly identify what happened here. >> reporter: while the new york governor kathy hochul on scene today calling for an end to the recent wave of violent crime. >> we say no more. no more mass shootings. no more disrupting lives. no more creating heart break for people. just trying to live their lives as normal new yorkyorkers. it has to end and end now. >> reporter: now we're hearing eight hours after it took place on the subway system, and still no suspect in custody. we know that law enforcement at the state and local level are working on leads. it will help that they have an image they've gotten from an eyewitness cell phone video. they're looking for a van and how that might be tied to a particular suspect. we know u-haul is working law enforcement. a lot of leads being chased do you mean here in new york city. but of course, this is a city on edge with this incident happening. now we know, 29 people have been hospitalized tied to it. jake? >> all right. from new york for us, thank you so much. the shooting raises questions about security on the new york subway system. i'll bring in the ceo. that's next. 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introducing new tresemme one step stylers. five professional benefits. one simple step. totally effortless. styling has never been easier. tresemme. do it with style. we're back with breaking news. moments ago, president biden addressed the morning rush hour attack in a subway station in brooklyn. ten people were shot. five remain in critical condition. president biden said that they were going to stay on top of the matter until everything was solved and the suspect was found. let's discuss with the ceo of the metropolitan transportation authority. thank you so much for joining us. new york mayor eric adams is telling subway riders that they'll see a visible police. were they prepared for this? >> yes, i think since mayor adams and governor hochul came in, they've been making big changes in security. they've been working more officers on to platforms, to be more visible and where riders feel vulnerable. today we had a terrible episode that the nypd is investigating and they're determined to take action. but that commitment to subway safety from the governor and the mayor has been in place for some time and now it will be increased even further, i know. >> the criminal who did this is who is responsible and i don't want to suggest anything otherwise. are you saying there were no mistakes made to allow this individual to get away? he committed this violent act in the subways and then escaped. no law enforcement authorities made any mistakes in allowing him to escape in any way? >> it is premature to say. i'm sure that all the post event analysis will take place in an appropriate time. right now what we need to focus on, our riders, who are so resilient, who come back again and again after 9/11, after hurricane sandy, after covid, our work force that powered us through covid, this is what new york is all about. what the subway system is all about. and after they get this bad guy, i'm sure there will be lots of discussion about what went wrong. i don't think the blame falls on anybody other than the criminal. that's my personal instinct. >> of course, of course. but law enforcement is there to protect people. i'm just wonder figure there was anything that could have been done differently. as you say, this will be studied in the future. what do you say to new yorkers who right now do not feel safe riding the subway? >> listen, i grew up in new york in the '70s. the system way safer than it was when i was a kid. there is no question that we've had a bunch of high profile incidents and some statistics that are alarming. new yorkers are committed to the subject way because it is what makes new york possible. the density, the ability to get to all the thing new york has to offer, jobs, education, culture. the subway is new york. it also dmenl straits our diversity and the way we all get along every day. there is no way new york letters back off because one maniac decides to ruin people's commutes with an attack. we'll continue living our lives and we really celebrate our commitment to riders in new york. >> he did a lot more than ruin people's commutes. five people are in critical condition. >> absolutely. i don't mean to understate it. let me rephrase that. 20 people are injured. ten people took bullets. this is about as serious as an attack gets. what we're saying is that new yorkers are not going to back off from living their lives the same way they've done again, powering through covid, powering through 9/11. that is part of our culture and we're going to make the system safer with the help of a committed mayor and governor. and we're going to make new york as, to bring life back to normal in every way possible. subways are key to that. >> what steps can the metropolitan transportation authority take to help law enforcement take to find this gunman? >> well, we have almost 10,000 cameras in our system. including almost 600 just on the brooklyn section of this one line where the attack took place. so we're going to work with the nypd to capture all that video to find out where this criminal may have come in or out of the system. and we're also just reviewing with everybody who is involved, all the information. there's a ton of evidence. i was on the platform today. the nypd was right in the middle of analyzing all of it. and i think they're hot on the trail. >> since the beginning of 2022, as you alluded to, there has been a large increase in transit crime in new york compared to the same period in 2021. what are you doing to address this surge in crime? >> well, i think i alluded to it earlier. the governor and the mayor made a commitment to it very early in the new year. they have put more officers both on the platforms and the train where people feel vulnerable. and there are, you know, there's an enormous effort to reach out to some of the people who for whatever reason have been sheltering in the subway system. we have a population that has been doing that. and to really start enforcing more on basic rule of conduct. no smoking, no beating the fare, no open drug useful all of those interdictions, all. those enforcement actions are starting to drive and will continue to drive bad guys out of the system, i believe. we have to get people with mental health issues that need housing to those services. but enforcement of our rules of conduct is also catching some bad guys and that i think will pay off in the long run. >> thank you so much. appreciate your time. coming up, from gas to food to housing. prices on nearly everything are driving inflation to a 40-year high. coming up next, the new steps the biden administration says they'll take to try to ease the pain for americans. stay with us. they're both invested..... in green energy. and also each other. digital tools so impressivive, you justst can't stop. what would you likike the power to do? 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[limu emu squawks] he'll be back. only pay for what you need. ♪ liberty, liberty, liberty, liberty. ♪ your shipping manager left to “find themself.” leaving you lost. you need to hire. i need indeed. indeed you do. indeed instant match instantly delivers quality candidates matching your job description. visit indeed.com/hire if you're a small business, there are lots of choices when it comes to your internet and technology needs. but when you choose comcast business internet, you choose the largest, fastest reliable network. you choose advanced security. and you choose fiber solutions with speeds up to 10 gigs to the most small businesses. make your business future ready with the network from the most innovative company. get internet and voice for $49.99 a month with a 2-year price guarantee. and ask how to get up to a $650 prepaid card with a qualifying bundle. turning to our politics lead, the numbers on inflation today bring unwelcome news for the biden administration despite the strong job market, prices for nearly everything in the united states from gas to food to housing are driving inflation to a 40-year high. cnn's jeff zeleny is traveling with president biden and has a look at how the white house is trying to ease some of the strain on americans' pocket books. >> reporter: president biden scrambling to address the latest grim economic news. with u.s. inflation surging to a new four-decade high. the consumer index climbed the fastest annual like. >> putin's invasion in ukraine has driven up gas prices and food prices all over the world. >> reporter: the president taking aim at those high gas prices today while touring an iowa ethanol plant where he announced a plan to temporarily allow a blend of gasoline to be sold this summer suspending the ban on fuel known as e-15. it was a rare presidential visit to the small community in a conservative county where the economy is on the minds of detractors -- >> for me, to compare it to two or three years ago, on the same products. today it is tremendously higher. >> reporter: and supporters alike. >> when people are hurting and in tough times, we really struggle to put blame and we want to try to find the sources and sometimes the easiest person to blame is the president and the current administration. >> reporter: the president making it clear he hears the concerns. as the white house focuses intently on inflation which has been above 6% for six straight months. while above the federal reserve's 2% target. today's labor department showed the latest spikes in food prices with the cost of meat up nearly 15% from last year. while the price of used vehicles appears to be leveling off, prices are still 35% higher than a year ago. >> we talked about inflation long before there was an invasion. but we also know that factually, if you look at the data, the average gas prices are up $1.80 -- 80 cents to a dollar. we've seen an increase in gas prices since the start of the invasion. and we know energy prices are a big driver of the inflation data. >> reporter: while deeply troubling to the white house, the inflation rate is nowhere close to a record with nearly 15% inflation in the early 1980s. along with soaring unemployment. today, a low unemployment rate of 3.6% and a strong demand for workers offers optimism for a stronger economy ahead. >> reporter: and president biden just finished his speech here a few moments ago. he said american pocket books should not be determined by the genocide committed by another dictator in another country. the first time president biden has used the word genocide, talking about ukraine. as for inflation, the central question is whether it has hit its peak or if that is still to come. jake? >> traveling with the president in iowa. thank you. so brian, obviously, inflation in the u.s. is skyrocketing. new numbers from the labor department showed the consumer price indelve rose 8.85 for the year that ended in march. that is the highest in eight years. joe manchin said in a statement today, instead of boldly, elected officials in the federal reserve, quote, continue to respond with half measures and rhetorical failures searching for where to lay the blame. how do you respond? >> well, look what we saw in march was a really elevated inflation number. it has the word ukraine all over it. two thirds of the increase in march was, i think, the price of gas at the pump. and as you know, that is being driven by putin's invasion of ukraine and the russian oil coming off the market. what the president is doing is exactly that. bombeding boldly and in an unprecedented way. the good news is, since the height of the gas prices in march, we've seen gas prices come down and a big part of the reason is the president mandated a release from our strategic petroleum reserve of a million barrels a day of oil on to the margaret. that's an action we could take and we galvanize them on put it on as well. you iare seeing a president focused on keeping an international coalition resolved to do what is necessary to counter putin's actions in ukraine while doing everything we can to protect consumers here at home and that's what he will continue to do. >> obviously, the war in ukraine is driving up fuel prices. nobody disputes that. but we were covering inflation long before putin invaded ukraine. inflation in the united states in the last year is, has preceded this attack. and some people here, the president in the white house blaming all of this on putin and think that's just not factual. >> let's be very factual. what i said was in march, the pre dominance of the increase was because of gas prices and that's because of putin's invasion. two-thirds of the increase in march was a result of that. but at the same time inflation is high in the united states. it is high around the world. we are hitting record inflation numbers in the e.u. and globally. we are, the president and we are very focused on what we can do practically to bring price increases down while also sustaining a strong recovery in the united states will that's the president's focus. legislation would do two things. lower cost for families and lower the deficit. both would have a positive impact on bringing inflation down and we're hopeful congress will act and w the urgency this requires. >> prices continue to rise. consumers are facing sticker shock for very basic items. gas prices are up 48% as you know. used cars are up 35%. food costs are up almost 9%. housing is up almost 5%. what is the president's message to americans that are hurting from these price increases? >> well, number one, he understands. he understands how this impacts people's pocket books and it creates uncertainty in their livesful number two, he will take every act that he can responsibly as president, including his, to releases of oil to the market including the actions today around the e-15 to provide some practical relief. and we are seeing some of that including gas prices coming down. we want to it come down more. but it is important to know we have seen some reduction. number three, he is going on keep calling on congress to take actions to provide some relief to lower cost for families. lower family's utility bills, prescription drug costs. that would make a big impact. lowering costs would have a big impact so we'll keep making the case and try to get that done. >> thank you so much. appreciate your time today. we are standing by for a news conference in new york city where authorities will update on that terrifying subway shooting earlier today. also ahead, president biden may be keeping u.s. troops out of ukraine but that isn't stopping another group of americans from stepping up. stay with us. but for someone to be able to work from here, there has to be someone here making sure e everything is saf. secucure. consistent. so log in frfrom here. oror here. assured that someonene is here ready to fix anything. anytime. anywhere. even here. that's because nobody... and i mean nobody... makes hybrid work, work better. >> tech: does your windshield have a crack? 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how are they reacting? >> reporter: they are saying they are aware the russian troop movements coming through donbas region, and signaling whether they are in the east of the country, possibly trying to cut ukrainian forces off. they are saying they're aware of that but they have their own battle plan and they say that they are ready and are moving forces to the east as well. at the same time, in the kyiv region and some other regions in ukraine as well, they've launched a large scale investigation into possible russian war crime. i caught up today with the