Be careful. The u. S. Homeland security chief urges vej lance after militants threaten one of americas largest malls. The families of three girls who have gone missing from london make an emotional appeal. Dont go to syria. The stars come out for the Academy Awards. A look at the big winners on stage and on the red carpet. Hello and welcome to our viewers here in the United States and all around the world. Im rosemary church. Im errol barnett. This is cnn newsroom. The u. S. Homeland security secretary wants anyone going to one of americas largest malls to be careful. This comes after the terrorist Group Al Shabaab released a video calling for attacks to malls in the u. S. , the u. K. And canada. As will ripley explains the threat may be a ploy by al shabaab to get recruits. Reporter their name means the youth. Al shabaab luring young men to east africa to launch bloody attacks. The group claim responsible for 2013s assault on kenyas westgate mall. More than 60 people died. What if such an attack to have occur in the mall of america in minnesota . Reporter this new al shabaab propaganda video reaches beyond the african borders targeting the west threatening westgatestyle mall attacks in the u. S. Canada and the u. K. This is a drill. Mall of america is now going into lockdown. Reporter the mall of america already has extensive security to protect more than 40 million annual visitors. Today theyre adding new safe measure saying, we take any potential threat seriously. The west edmonton mall in alberta, canada is, also increasing security. Even as u. S. Counterterrorism Officials Say theres no indication of an actual threat. The fbi thinks al russia sbab trying to use propaganda like isis and al qaeda to inspire new jihadists. The somaliabased militants recruit heavily in minneapolis, home to the largest somali population in the u. S. We are still losing them. Its a terrorist hotbed in the midwest, the United States it is. Reporter cnns been investigating terrorist recruitment groups in minnesota for five years. Minneapolis Community Leader say a small minority of disillusioned young men are looking for a path. Most of these kids are torn between two cultures. Theyre americans, but theyre not necessarily they dont feel totally accepted eded as americans. This is the real disneyland. Reporter al shabaab recruit recruited one young man, and another from canada. Both recruited and died fighting for terrorist groups. It is the hardest it is. Reporter castigars mother told cnn she believes her son of manipulated by propaganda. The same propaganda now calling for bloody attacks on western malls, trying to strike fear in the heart of the west. Warship ripley, cnn, new york. Jay johnson, the head of the United States department of Homeland Security says theres no specific plot. Still people should stay alert. If anyone is planning to go to the mall of america, theyve got to be particularly careful. As the statement you read indicates, there will be enhanced security there that will be apparent to people who are there federal security as well . There will be enhanced security there. Public vigilance, public awareness, and public caution in situations like this is particularly important. Its the environment were in frankly. And as we reported a mall in edmonton canada is also among the shopping areas al shabaab mentions in its video. The citys police chief says they are keeping an eye on the situation. Take a listen. This was a very general comment. It wasnt specific. We to not have an identified specific threat. Having said that, because of the nature of the threat we as a policing agency are absolutely paying attention to this. We will be putting in places processes to address what we see out there. I have to emphasize i feel west hampton mall is very safe. And Londons Metropolitan Police counterterror command says it is aware of the video, as well. Also in london, the plea of one father captures a familys agony. We cannot stop crying he, hoping to reach his daughter who may have run away to join isis. The families of three missing teenage girls are also u all pleading for them to come are all pleading for them to come home. As we report the number of young people being houred by extremist propaganda is on the rise. Reporter three teenaged friends, two 15yearold and a 16yearold, shamima begum, kadiza sultana, and amira abase, School Friends spending the day together. Now at the heart of an international hunt. To get her back what shes doing is completely nonsense. To get back just remember how we love you. And your sister brother, are they cannot stop crying. Reporter the girls families all searching for answers. British police say the girls took a flight to istanbul and are believed to be on their way into syria to join isis. Shes an astar student. Shes to convince such young girls at that age that are so vulnerable and so its just wrong. Its evil. Its a really evil thing to do. Youre breaking up entire families. Though youre convincing these girls theyre more important than we are. Reporter school yard say theyre concern by the Scotland Yard say theyre concerned by the sheer numbers of young girls or young women hoping to or who have made their way to join isis fires. They wouldnt give us any numbers but admit its a growing trend. Theyre asking other parents to please be vigilant. If young people are showing people in passports, trying to get hold of lots of money, there are signs. Anything breaking the normal routine, any sort of evidence if you like, of children lying about where they may be or may not be. Reporter British Police say the friends are still in turkey, once theyre in syria with isis its unlikely they will ever be allowed to leave. In the meantime, their family is still hopeful. We want you to know that we all miss you. We love you. Everyones hurting. We dont know if youre safe, especially your mom. Find the courage in your heart to contact us and let us know that youre safe and youre okay. Thats all we ask. Reporter the clock for them and their families is ticking. Time is running out. Cnn, london. In iraq theres no word on the fate of about 21 Kurdish Peshmerga fighters captured by isis. Over the weekend, the Extremist Group released a video aimed at getting other kurds to lay down their weapons and use the prison force relay the message. Our Senior International correspondent, ben wedeman is, in erbil and joins us live. What exactly is in this video and considering theres a propaganda tool that isis uses quite frequently, what should Coalition Forces make of it . Reporter this is a anyoneminute video this shows nineminute video showing men clad in orange jumpsuits being walked in chains to their cages. Theyre theyre interviewed by a bearded man with a microphobe. On that microphone is an isis logo logo. He asked their name, where theyre from. Then one he asked them if he has a message to the pesh america athe kurdish fighters aat peshmerga, the kurdish fighters and he says yes, lay down yours arms stop fighting for what he calls the jews and crusaders if you want to avoid a fate similar to that was ours. We see them still in cages being paraded on the back of pickup trucks through the crowded city streets appears that its the town that is just south of kirkuk. Now interspersed in this video, there are some flash frames of the beheadings of egyptian christians that happened last week in elizabeth. But this video actually ends with a tight shot of one of the prisoners. Theres no indication they have been executed. But that certainly is the concern of many here that that may be the next installment of these chilling propaganda videos coming out of isis. Its intended to undermine the morale of kurdish fighters but weve spoken to many people here. And theyre sort of they shrug it off. They realize its propaganda. Theyre angry that and regret that their comrades are captives of isis. They realize theres not a lot they can do but they look ahead. They realize this is a long fight with this organization. Errol . So ben, you have a psychological effort by isis to weaken peshmerga fighters. Over the weekend, isis attempted to break through a number of the peshmerga front lines. Whats the latest on that . Where does that stand this sunday . Reporter in less than a week there have been three major assaults on kurdish positions around erbil. The first was on tuesday night. To the west in a place that was repulsed overnight, there were two assaults on kurdish positions. One to the south in mahmur and another near the mountains near the syrian border. As far as mahmur goes we understand from commanders this more than 50 isis fighters were killed as they tried to break through the front lines. There were Coalition Aircraft also involved in that action in the mountains. Apparently at least 30 isis fighters were killed. And this despite fact that the kurds as they will tell you time and time again, they lack any sort of heavy weaponry. They lack ammunition. They lack a lot of things. What they dont lack is the realization that theres no making peace with isis and their intention is to defend their homeland no matter what. Ben wedeman live in iraq. Thanks. Australia is taking big new steps to bolster its counterterrorism efforts amid rising concerns over homegrown threats. The Prime Minister announced a new package of security measures early today. This comes after a terrorist siege at a sydney cafe that left two hostages dead in december. Mr. Abbott says parts of the package are aimed at slowing foreign fighters from traveling abroad. Already at least 110 australians have traveled overseas to join the death cult in iraq and syria. At least 20 of them so far are dead. Even if the flow of foreign fighters to syria and iraq stopped today, theres a cohort of hardened jihadists who are intent on radicalizing and influence others. A government review in australia is currently investigating over 400 highpriority cases. That number has doubled from a year ago. Egypts president is calling for a unified Arab Military force to combat the spreading threat from militants across the middle east. The egyptian president said 20 target werity in libya. It followed isis beheading of 21 kidnapped egyptian christians in elizabeth which they in libya which they showed in a video. He thanked the United Arab Emirates and jordan. British police have identified three soccer fans they say were involved in a racist incident on the paris metro. Chelsea supporters are accused of preventing a black man from boarding the train last week. They were also heard chanting were racist, and thats the way we like it. It happened during a tourism match between britains chelsea and paris st. Germaine. One of the suspects richard barkley, is apologizing for the incident. Look at what his lawyer says. He did not participate in racist chanting and singing and condemns any behavior supporting that. His lawyer add that his client is sorry for the trauma and stress the victim suffered. Well up ahead, birdman swooped up the top award on hollywoods biggest night winning for best picture. It won throw other oscars for best cinematography directing, and original screenplay. The grand Budapest Hotel also won four oscars. Well look at other big winners and memorable moments coming up. Youre with cnn newsroom. Just ahead the city [ screams ] a deadly bumming mars a unit bombing mars a unity rally in ukraine. Plus, whats causing south korea to look like this . And disturbing new interrogation video. Why two young girls in the u. S. 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In Eastern Ukraine, an explosion killinged at least two people including a police officer. It happen during a peaceful progovernment march sunday. Government Officials Say theyve arrested four people and say the explosion is a suspected terrorist act. Meanwhile in kiev activives held a dignity march to mark one year since prorussian president yanukovych of deposed. Lets bring in Senior International correspondent Fred Pleitgen live in kiev for more on the blast and the latest on ukraines ceasefire. Fred, what more information do you have on the blast and those arrest d arrested . Reporter we got information from ukrainian authors. They do place the blame once again on russia. Theres one Security Organization here in ukraine that says that the people who are behind all of this are in russia. They believe there might have been russian involvement as far as the Russian Intelligence Service concerned as well. What we know from Ukrainian Security sfoersz that four people have been arrest after the blast. Apparently they belong in an organization that trained in belograde in russia according to the ukrainian authorities. We havent gotten anything from the russian authorities so far. Obviously this is a horrible blast that happened there. One of the thing we have to know is that the town does have a certain degree of volatility. There wasfliction shortly after the revolution happened about a year was friction shortly after the revolution happened about a year ago. There were buildings that were occupied and riots, frankly, between russian speaker and the proukrainian government population there. It is a place that so far has not been engulf in the worst of the violence like in other places in Eastern Ukraine. But there are many in key whoef fear there might be forces trying to destablize it as well to get it torn into the area that has been so badly hit by the violence they believe it may be the next target of prorussian separatists. Theres nothing that would confirm that but thats the fear on the ground in kiev. Rosemary . Lets take closer look at that ceasefire in Eastern Ukraine which appears to be that in name only. What is happening on the ground as the ceasefire hangs by a thread . Reporter i wouldnt say its in name only. But there are certainly infringements happening. One of the things ukrainians are saying is they have a plan in place to withdraw heavy weapons from the front line. Frankly they say they can enact the plan unless the fighting stops in all places along the ceasefire line. They say clear that that is what the ceasefire agreement says. The prorussian separatists for their part have saidive theyve signed an order to withdraw heavy weapons. Its unclear at this point whether or not thats been enacted. Whether or not any weapons are being with drawn. At this point in time the organization thats supposed to monitor the ceasefire and the next stage of the ceasefire, which would be the withdrawal of heavy weapons cant get to most of the areas where it is supposed to do that. There have been freer enfrankments that happened overnight. Authors told us there were only two breaches of the ceasefire a lot less than weve been seeing over the past couple of days. Clearly there still is enough tension, there are enough skirmishes for at least the ukrainian side to say at this point in time theyre not willing to move to the next stage and get their heavy weapons ready for the front line. Fred pleatitgen joining us live from kiev. Thunderstorm watch thank you very much. In bangladesh at least 68 people were killed when a ferry got capsized there. Local Officials Say 19 children are among the dead. This happened sunday on the river north of the capital. Police say the doubledecker ferry sank after a cargo ship hit it. A transport official says about 100 people were rescued, but its unclear exactly how many were on board. Ferry operators usually dont keep record. Ferry crashes lead to dozens of deaths every year in bangladesh. If youre watching from south korea, there are warnings to stay inside today. Coming up whats causing much of the country to look like this and why its so dangerous. Stay with us. South korea is dealing with this dangerous yellow dust. This is what seoul looks like at the moment. Meteorologists say its the worst