Americans in brussels to shelter there in place. Alert levelssed here in new york as well and other american cities, we have full coverage right now. Well begin with alex mauardt, he inhe scene at the Brussels Airport with the latest. Good morning, alex. Reporter good morning, george. Dramatic scenes here at the brussels zaventem airport. The edge of the Police Perimeter told to stop here, passengers talking about scenes of utter pandemonium inside. These two explosions now one of which we understand was from a suicide bomber coming just aft 8 00 at the peak of travel time. You can see here there have been thousands of people streaming outmro this airport just now a new wave ofpleo with tir bags, some clutching those Airline Blankets that weve all used. They have their bags with them. This is a calm scene here. But you can see their faces are drawn, very serious. Theres a lot of confusion, people trying to figure out how there are buses lined up taking people away. But the people we spoke to inside describe much more dramatic scenes and spoke to an eyewitness checking into the American Airlines counter when the first he can explosion went off about 30 yards away from him. He thought that it took place closer to the delta counter and thats going to be one of the things experts look into now is whether anything specifically was targeted in the airport but eyewitnesses talking about scenes of utter carnage, bodies on the floor of debris everywhere and Ceiling Tiles on the floor. Absolute chaos. Okay, alex. The first explosion occurred at 8 a. M. Witnesses describe the ceiling blood from the victims. It drop down on top of my girl a a there was a second explosion. An American Girl next to me. Reporter at least 13 dead. The number of injured still being counted. Witnesses described it as a war zone. Circles in the air, the airplanes. Thereby explosions in the terminal hall. Thats why we dont allow anyone anymore. Reporter an explosion at the maelbeek subway station. A loud boom heard and First Responders ran through the street with people on stretchers. Their clothes badly torn. I just stood off the metro when we heard a loud muffled thud. More panic set it. Reporter as the belgian capital has been on high alert abdeslam last week. You can see these buses pull ago way with people inside. Those travelers being taken away from the airport. After that attack at the metro station the entire brussels metro system shut down. We understand 15 People Killed in that attack in addition to 1 here. The entire Public Transit system across brussels including the airport, metro buses and trains has been shut down. European intelligence officials have been telling us more fronts it was not a question of if but when the next terrorist attack would happen. George. Okay, alex, thanksardt at the brussel airport. Want to turn to an eyewitness tothe attack on the in e tree. Zoa, i und towards the metro when you heard about the explosion. What did you see . I saw a scene of probably around about a dozen to 15 lying outside the metro entrance an rue de la roi. The actual station itself, maelbeek is just a few hundred meters from the main scene of eu activity, the European Commission and the european council. Its around about 200 meters away from my office. So i was already basically there when i heard there had been attacks on maelbeek and i was running towards it to see what was going on. And a scene of chaos and you were able to see the wounded and casualties being taken out. Tell us more about this neighborhood. What is around this neighborhood. Around maelbeek its really just the heart of the european quarter. The European Commission and council nearby, very close within a few hundred meters, its up fro the shuman metrotation for the european quarter and coast to the probably around a five to sevenminute walk. Those are the three main ones in brussels and close to the artsloi and the Russian Embassy around there. Several embassies in that artsloi area and one stop in the opposite direction from maelbeek from schu uchltschuman. Zoya sheftolovich, thanks for that report. Well talk to christian pore the latest on security. Youre most familiar with what happened in the metro station. What is the latest that you can tell us, sir . Well, the information that i could gather is the fact that we had an explosion in the metro station called maelbeek. Several casualties, we have several people deceased, several but i dont have exact figures about the casualties yet now. Rapidly Fire Department and medical service and police were deployed on the scene. There is a large security perimeter installed now so that all those services can work on the scene. And the airport as well and what exactly are the services doing there right now, the police force doing right now at this hour . Well, for the Police Forces we have the past two protect the medical services working there and also to prevent people from entering the security perimeter so that there is no danger for the medical service and the Fire Departments to work. And, sir, there was no indication about an imminent attack of any sort . Attack, they dont prevent or they dont say on the forehand that they will commit an attack, of course. And the heightened alert that you are under now, can you tell us what precautions are being taken . Well, all public transport is shut down in brussels. There are no buses, no trams, no metro and the taken stations are also closed in brussels and the people are off to remain inside so that we, the police and Security Forces can work on the scene. All right, mr. Deconick, please know our thoughts are with everyone there. Thank you for joining us. Thanks. Want to go to our chief Global Affairs anchor Martha Raddatz in washington. Martha, we just heard the Brussels Police spokesman said they had no indication that this was coming. No specific intelligence but there was a great concern after the takedown of Salah Abdeslam in brussels earlier this week that that could trigger this thats exactly right, george. They feared that there was an attack that was planned and when he was arrested that they might do that attack early because they might have feared that abdeslam would tell authorities something, tell them where it might happen so by all appearances, this terror attack was carried out quickly, they coordinated very quickly to get this going today. Whether airport it was planned for today or whether or not it was planned for several months from now we dont know. Theres certainly terror cells operating in europe. Belgium by the way is the largest supplier of European Countries of foreign fighters in syria and, of course, the fear is always that they will go into syria, they will fight with isis, they will get trained and they will come back out and head for europe to carry out these kinds of attacks. Martha, one of the biggest concerns this attack was able to despite the fact there had been such a heavy Police Presence, heavy intelligence presence especially in that molenbeek neighborhood where Salah Abdeslam was found for the four months since these terror attacks in paris. Reporter theyve been completely focused on this, george. As you know back in november i was standing in that neighborhood and we were talking about the focus on that neighborhood right after those paris attacks, the city was virtually shut down in lockdown. Armored personnel carriers were everywhere on the street. You really couldnt go anywhere without seeing that Police Presence. Now, perhaps there was an attack planned for that time and perhaps they didnt carry it out because of that Police Presence but what happens is they then go dark. They go under ground and dont communicate with one another in the typical ways by cell phone or by internet. They can go on encrypted devices and can figure out a way to coordinate an attack like this where it will be, go after as we saw in this one those soft think of an airport as a soft target but that part of an airport is indeed a soft target. Im sure as we all know when we go into airports there is security. Some sort of security on the outside. Dont want you to stop out front in your car but you can get things inside, clearly you can get things inside. If there was a suicide bomber as is being reported at least one suicide bomber, they will find out how he got in there, where the car was, how they got there, and trace back do the forensics on trying to figure out who this person was, who else carried it out, we dont know whether or how many suspects there were, how many people may have carried this out. Whether it was on the tracks there in the subway system, how they got on to those tracks. There are going to be security video coming out and im sure well get a lot of questions answered. Its very hard to prevent to carry out an attack especially if youre a suicide bomber. Thanks very much. Of course, joining us is ray kelly, the former Police Commissioner here in new york city and also Pierre Thomas and you know of course, law officials are monitoring whats happening so closely. What are you hearing from the government . Top Law Enforcement officials have been briefed includingeing Loretta Lynch and james comey. No threat to the United States they know of. They dont believe we have the sophisticated terror cells, networks that they have in europe but what theyre mosted concern about today is copycats, people who could be inspired by what theyre seeing and the fbi monitoring rough lyly 24 people. People who have been radicalized online through social media. That is the big concern someone here will react to it here. Ray kelly in new york city, a lot are waking up, just after 7 7 00 eastern time. I think what youre seeing now is deployment of uniformed officers, the officers that started work at midnight, they will be held into the day tour and see that particularly in the subway system. New york has the busiest subway system arguably in the world, 6 million travel that system every day so you want to increase the uniformed presence. What you probably wont see but may happen is a door knocking campaign. What do you mean. Concerned about they want them to know that, hey, were watching you. How are you doing . That sort of thing. Now, that may happen, may not happen. It depends on what the estimate is of fbi and nypd as to whether or not theres anybody with a tendency to be a copycat. And new york city always on high alert. Were always very vigilant and dill cent and whats going on. You had two major attacks here. You had at least 20 terrorist attempts here in new york city. And new york city has responded well and has the unique capacity to put out a lot of uniformed officers on the street. Critical response command and overlay of Police Officers so thats what youll see deployed in uniform obviously lots of things going on that you wont be able to see. We see more activity here in times square and as you were saying, pierre, what youre alluding to when we see whats going on in europe in recent months and the last year or so, as youre alluding to there has to be a concern why we would not think that that could possibly happen here in the u. S. Recent history is a guide. Think about paris attacks last november. For weeks the United States said, no specific credible threat then San Bernardino. That is the concern that you would have, that people would be inspired and then take action then thats hard to determine beforehand. You have to have the intelligence beforehand. Campaign by the fbi looking at social media, looking at people who might be inspired by isis and one thing thats happened in the last six months or so, the fbi went from seeing people who were simply trying to travel to syria and join isis and planning to do things here they believe they stopped. Okay, pierre, thanks very much. To jon karl now. Traveling with the president in cuba and the president now has been briefed . Reporter thats right. The president was briefed well before dawn and, has his National Security team with him including National Security advisers susan rice, secretary of state john kerry. The state department is also issued a warning through the embassy in brussels to american citizens there thats quite stark, george. It says that american citizens should shelter in place and remind americans in belgium that there was a level 4 threat, a level 4 threat which means a serious and imminent danger a attack so clearly u. S. Officials were watching what was happening in belgium and well aware of the danger. Now the president has been briefed and has a packed schedule here for the rest of the day including later this morning an address televised nationally in cubabao the cuban people and then hes attending a baseball game. No indication from the white house that there will be any change to the president s schedule. In fact hes leaving from here to go on to argentina but, of course, as you well know, george, when the president travels on these trips he has his full National Security apparatus with him communications and all that. Full expectation hell continue the trip, complete the trip hes on right now. One thing we heard from the president in recent months is that this expectation that Martha Raddatz was talking about that we cannot have perfect security against this kind of threat when people are willing to take matters into their own hands and die in order to kill. Reporter the president has been walking a fine line here line against this terrorist threat, against isis but also trying to put it in context and saying, that the threat is something that must be contained, must be dealt with, looking at the threat as something that many people frankly in the view of the president have exaggerated. A very tough argument to make when you have another attack in the heart of europe with dozens more killed but the president s view is that there is no such thing as perfect security that you must contain this threat and deal with it in every way possible but put it in context. Jon karl, thanks very much. Well go back to Alex Marquardt. You have been on the scene there in the Brussels Airport from the very beginning of all this. What is the latest youre hearing now, alex. Reporter people continue to stream out of here. There have been travelers coming out for the past four hours. There were thousands of people in that departure hall when the explosions went off. Of where this happened when we say departure hall the area before security before you would go through the xray machines and take off your shoes where everybody was checking in. There have been convoys of buses watching them now over here that keep going past, packed to the brim with people who were either trying to take off or had just landed. Its worth reiterating that all of the air travel has been stopped. No planes going out or coming back in. People are in various states. Weve seen lots of emotion, lots of people crying, lots of people hugging. Some with blankets wrapped around them. Others just confused by whats going on because they werent able to actually get inside the airport. But whats clear is now these the passengers from inside the terminal are being taken away from the airport. We understand that a makeshift hospital has been set up nearby. Belgian prosecutor is that 13 people were killed inside the airport, there are wounded. We dont have the figure on that. At least one of the two explosions was carried out by a suicide bomber. 13 there and were hearing 15 in the metro owe overall at least 28 dead there. Many injured. Well going to take a short break. For some of you that is your local news and weather next and Team Coverage of these deadly terror attacks returns in just a moment here on good morning america. Multiple sclerosis . This is tecfidera. Tecfidera is not an injection. Its a pill for relapsing ms that has the power to cut relapses in half. Imagine what you could do with fewer relapses. 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