0 our breaking news coverage continues here on cnn. i'm live here in boston, massachusetts. i'm jake tapper. >> i'm john berman. it is 5:00 a.m. in the east. what a night. what a night it has been. a massive dramatic police operation unfolding just outside of boston this morning. they are going door-to-door looking for a man who fits the description of boston marathon bombing suspect number two. that is the man seen wearing the white cap in the photos you have been looking at. listen. >> what we are looking for right now is a suspect consistent with the description of suspect number two, the white-capped individual who was involved in monday's bombing of the boston marathon. >> they have also revealed that suspect number one is dead. you may know him as the man wearing the black hat in the photos. this is a warning, people near watertown, massachusetts, eight miles outside of boston, are told to stay inside. do not answer the door unless the people at the door can clearly identify themselves as law enforcement officials. this mayhem unfolded overnight starting with a shooting on the campus of the massachusetts institute of technology in cambridge. that's one mile from where we are standing right now at the scene of the boston marathon attack. >> an officer who was killed on the campus of m.i.t. was killed a short time later, a carjacking took place and a police chase took place after that with reports of explosives involved. during the chase, the transportation authority officer was wounded in a shoot-out and suspect number one was critically wounded and later died at the hospital. we expect a press conference in 15 minutes at the hospital. >> we have drew griffin with us right now on the streets of watertown, massachusetts. again, this is the area right now which is a very active crime scene where people are being told not to leave their houses where it is believed that suspect number two, the man involved in the boston marathon bombings and the man involved in this car chase and manhunt, it is believe this is where he's on the loose. drew griffin? >> reporter: to that end, i just listened to a robocall police have been sending to all its residents warning just that, you wonder how people hear the warning in the middle of the night when sleeping, well, the police in this town in watertown have sent out a robocall to the people telling them not to leave their home, telling them about the police emergency and not to answer the door. there's an active search here for suspect number two as we understand it. and i might point out one other thing that we haven't really talked about, is where these two suspects put their bombs together. they are somewhere presumably in this area, not watertown, but in the greater boston area. there's some kind of dwelling, apartment, home or room where these gentlemen put their bombs together that is still very dangerous. and i'm sure police are trying to figure out exactly where they were living, if they were living in the same place they were building the bombs, and just how to handle that because they could also be a very volatile scene they have to deal with yet as they still look for one more suspect. so this is far, far from over. it's been a chaotic week, a chaotic night. very dramatic finish here with one of the suspects dead and one on the loose. with all this danger out there, this could turn into a very long day. >> drew, we believe this investigation has been going on since monday. it is now white hot. you can imagine that police, law enforcement officials have been told that 9,000 law enforcement officials are in the area now involved in this investigation. there's the manhunt underway for suspect number two, the man in the white hat at the finish line of the boston marathon, now believed to be wearing a gray hoodie. there's the map hunt going on and there are people putting together this puzzle, which is probably becoming ever more clear by the second now they have identified these two men. as you said, looking for a dwelling. trying to go through their vehicles and trying to piece together their movements, not just over the last four or five days here in boston, but before that. there was an enormous amount of information and they no doubt would like to glean from that. let's stick to watertown, massachusetts, which is again where a lot of this culminated tonight. there was this car chase, there was a shoot-out, one suspect, suspect number one in the boston marathon bombings now dead. suspect number two on the loose. do you get the sense that people are heeding the warnings they have been given to stay inside, to not come out on the streets right now because it is a very dangerous situation? >> reporter: i am just looking around and see very few people who are not of the press or of law enforcement. we did see a few citizens come out earlier in the evening. they have all gone away. there's absolutely no street traffic in any of the directions except the flashing lights you see behind me and from the law enforcement vehicles coming in and out. so this town has buttoned up. i don't see any door-to-door searches from my vantage point. that could be because this area is cleared and the suspect ran in a different direction. behind me is where the shoot-out and activity took place. a few blocks down and around that corner. we were up there shortly after it happened, literally 100 or so police vehicles and hundreds of police officers swarming the area, looking here or there with their guns drawn, but once that scene settled we were pushed back to this location. it is a quiet scene, and i have to say at this hour of the morning, it is early quiet because this town should be starting to wake up and right now it's just not. >> drew griffin there in watertown, massachusetts. i ask everyone out there to forgive me for looking down at my various electronic devices. there's so much information new coming in. this information so fluent and really we have to keep abreast of the latest situation right now. but let me tell you this, this terrorist bombing that happened on monday taking the lives of three people watching the boston marathon and more than 170 people injured, we have new victims tonight. there was a campus police officer at m.i.t. university across the charles river here who was killed by the suspects. there was a car chase and an mbta officer was shot and wounded in this police chase. two more casualties, one dead and one wounded in this incredibly dramatic week of crime and terrorist in the massachusetts area. again, just to bring people up to speed on what we know, because it has been changing by the hour right now. at 10:20 last night in the city of cambridge, massachusetts, on the campus of m.i.t. there was a police officer killed in his car multiple gunshot wounds. there was a carjacking with the man who owned the car kept in the car for a short period of time. a police chase ensued and at some point the man in the car was released. a very lucky man. some time during the police chase there was a shoot-out and suspect number one, the man seen in the black hat at the finish line of the boston marathon, suspect number one was wounded and taken to the hospital. suspect number two is still on the loose. suspect number two was in the white hat at the boston marathon bombings. police released a new photo of him among the many new photos. >> that's him at a 7-eleven last night wearing a gray hoodie. he's thought to be armed and extremely dangerous in the area of watertown, massachusetts, about eight miles outside of boston. and the individuals there, people who live there, are told not to leave their homes. do not answer the door unless it is an identified police officer. if you do get a knock on your door, it could be an actual police officer but do not answer it unless it is a police officer. there are upwards of 9,000 to 10,000 police officers in watertown right now looking for this individual, suspect number two, with the white hat. there's also a robocall going out to residents of watertown warning them of this threat in their midst. one other thing about this threat, and this is coming from overnight when we were following this story all night. there was an individual who it turns out presumably is completely innocent, but police detained him and made him take off all of his clothing. and when they made him take off all his clothing, it was clearly because they worried about an explosive on him. >> jake, here's what should be happening just to remind people, it's a vacation week in massachusetts. so a lot of people from here, a lot of people left town on friday and have missed all of this. there's a lot of empty homes and apartments in watertown, cambridge, all these places. so what they want to do is sort of make sure that these homes that are vacated, that the suspect is not in there, but they want to make sure the suspect is not holding people within their own homes. we will probably start to see some controlled evacuations just to get people out of there, who wants to be in watertown right now if this is going to be ongoing throughout the course of the day. so you'll probably start to see some evacuations, getting people to safe areas, getting them to their family and friends, and to let the police do what they need to do in watertown. >> we are just learning that the mbta, the transportation authority here, is sending buses to the watertown area to help remove the people who live there, evacuate some people, just get them out. get them to safety so they can do this manhunt and go door-to-door in the meticulous way they want. >> we do not want friendly fire if there will be fire going on. this is a residential neighborhood. so this is what law enforcement does, you get the citizens out and you now secure the area and hopefully as i have been saying when daylight comes, they'll be able to, he'll be more exposed than he has been. >> one of the ways they have been warning people in the watertown area is with phone calls, robocalls made to most of the residents there. let's listen to what it sounds like. >> there's an active incident in watertown right now. chief devoe is advising all residents to remain in their homes. if you hear or see anything suspicious, call the watertown police department. >> stay in your homes, do not answer the door unless the person clearly is identified as a law enforcement official. >> you have to remember, most people in watertown have probably slept through this. they with waking up getting ready for work or going out for a run. so you are seeing this, what's called reverse 911, which is the phone calls going out to every single home, every phone number they have in watertown. just telling people -- they are essentially waking them up, which is the right thing to do. >> perhaps you slept through through this. in the boston area, we had a huge amount of supers that woke me up from bed in boston. i'm getting e-mails from several people in this area who would never normally be up at the 3:00, 4:00, 5:00 hour waking up to this because everyone wants to know what's going to happen here. >> as the events unfolded, it started at 10:20 on the campus of the massachusetts institute of technology, the m.i.t. campus. there was one officer shot that led to a carjacking. this led to one of the suspects wanted in the terrorist attacks in the boston marathon massacre, one of them was on the loose and taken to the hospital. we expect a press conference there. we already know he's dead. he has been killed. the individual on the loose, suspect number two with the white hat, there is a picture of him taken this evening. let's get that on the screen. it's him wearing a gray hoodie taken at a 7-eleven earlier. there was a press conference an hour ago when law enforcement warned of this individual and talked about the steps they were taking to get him. there were 9,000 or 10,000 police officers swarming throughout the area of watertown, massachusetts. john, you're from this area, what -- >> watertown is an area eight miles outside of boston, outside of cambridge. i won't say it's a better community, it is closer than that to boston. a lot of people live there who work in the city. a perfectly nice town. on the phone with us we have brad, a producer for "piers morgan" who was in boston witnessing a great deal of police activity at this moment. what are you seeing? sorry, we lost him for a second. we'll go back to watertown, jake, i have to give you a sense of the scope of this investigation. we are in boston standing near the finish line of the boston marathon right now a mile and a half away from m.i.t. the news conference right now is about to start. i believe this is at the hospital where one of the suspects was taken. correction, this is an fbi news conference, where i imagine we'll get a great deal of information on this investigation on this nights that has unfolded. boy, has a lot been going on. >> it's been an eventful evening. one of the things challenging about this for people watching at home and for those of us following it in the media, we did not know for certain until roughly an hour ago that these events were definitively connected. there was a strong suspicion with police officers operating under the presumption that the officer killed at m.i.t. was killed by one of the suspects or both of the suspects in the terrorist attack on monday. that the carjacking was related, that the incident going on in watertown, the shoot-out going on in watertown was connected, but we were not certain. even though there were police and fbi swarming in both areas, even though the command center, the mobile command center that was here when we began broadcasting here, from here at 12:30 this morning, even though it left and went to parts unknown, we did not know for certain until the fbi definitively and law enforcement and the commonwealth attorney put out statements definitively stating that these two suspects have been involved in everything. one of the suspects is now dead and one of them is now wanted and presumed extremely dangerous in watertown, massachusetts. >> the boston city police chief said this man is a terrorist who is on the loose right now. and you have to be very, very careful if you live in the watertown area. do not answer your door unless you know it is a law enforcement official outside there. that's the picture of the suspect right now that was taken earlier this evening or last night in a gray hoodie at a 7-eleven store. >> by the time this night is over, we probably have a couple dozen law enforcement agencies been on this search alone. when you think of the mbta, the state police, boston, cambridge, watertown and the others, it's a unified effort. you can tell that right now and it really does show you how sort of local police are really sort of dealing with crime, they deal with searching for terrorists. it's a huge burden on them. and i hear that there's a couple thousand cops on this one hunt right now. so, you know, we'll see what unfolds in the next few hours. >> it turns out there's not an fbi conference coming in the next few minutes, but we are expecting a news conference from the hospital where the suspect number one, the man in the black hat, was taken after he was wounded in this police chase. he died at that hospital. again, one of the suspects in the boston marathon bombings now dead. >> killed in a shoot-out with police officers because there was an incident on the campus of m.i.t., the massachusetts institute of technology, and there was a car chase with police officers chasing the two suspects. one of them now dead. one of them on the loose and presumed extremely dangerous. >> let's try to get brad farks on the phone witnessing what's going on there. what can you tell us? >> i'm at the corner of arsonal street here where a truck has pulled up. we have seen 20 law enforcement vehicles ranging from black suvs to unmarked cars come through the road block that is blocking school street off. we have also seen about three transit buses being driven by law enforcement officials. we were told at one point they may be used to evacuate residents and we did hear from officials they could be used as a shield. we are seeing about six canine units also walking around right now. there's a heavy presence, they appear to be staging this on the intersection of school street and dexter avenue. we see about three local transit buses, but everyone seems to be just kind of holding in place right now. >> all right, brad parks for us on the ground. >> people of boston, in particular, there's just going to be a lot of these packages, suspicious bags, i think over the next couple of days. because law enforcement is going to be very, very nervous about what might be out there and whether there are copy cats. we'll see a lot of this activity. >> i'm john berman. jay tapper. juliette kayyen. we are here in boston and have been covering all the events happening since 10:00 last night. at 10:00 last night, 10:20 p.m., there was a shooting, a campus police officer at the massachusetts institute of technology shot and killed in his car multiple gunshot wounds. then there was a carjacking. two suspects hijacking a car, keeping the men in the car with them for a short while and then there was a police chase. >> we should also note, the man was let free, amazingly, and is apparently unharmed. >> during this police chase authorities say that perhaps the suspects were throwing explosives out the window at law enforcement officials. showing you just how dangerous this situation is. then a shoot-out, suspect number one was shot and wounded. he was taken to a local area hospital where he since died. and then at this point authorities are saying suspect number two, the man who has been seen as the man in the white hat at the boston marathon finish line, suspect number two is currently on the loose and there's a manhunt underway. >> this is something we need to reiterate. we apologize for those hearing this for the tenth time, twelth time, whatever, if you live in the watertown area, do not leave your homes or answer the door unless it is a clearly identified police officer. you should expect, because roughly 9,000 to 10,000 police officers are in watertown, going door-to-door. you should expect a police officer to knock on your door, and if he's clearly identified, answer the door. we also call them robocalls. juliette and others call them reverse 911s, but there are reverse calls going out to the residents of watertown, massachusetts, warning them about what's going on. warning them there is in the words of law enforcement a terrorist on the loose in watertown. >> and the mbta, the transportation authority here sending buses to the watertown area to help get innocent people out to evacuate them to make the crime scene easier to deal with right now. deborah farrick is on the scene. what are you seeing? >> just to let you know what's here, police have cornered off a major area of arsenal in the watertown area ch. police officers are heavily armed with assault rifles in full protective gear with helmets and vests. there are staging area where is a number of officers are getting direction. we are told that a state trooper is checking cars. >> i'm sorry, we have to interrupt. deb, we are going to interrupt you right now, there's a press conference going on right now at beth israel hospital where this first suspect was brought after he was wounded and died. we'll go live to beth israel right now. >> we still do have 12 victims from the initial event hospitalized here at the hospital. one of them still in serious condition in the icu. we initially received 24 patients here from the original event on monday. the vast majority of those patients have been discharged. we are open and ready for any patients to come to the medical center this morning, although we are restricting