We have to let the investigation unfold. As president obama and World Leaders descend on new york for a meeting at the u. N. This morning. You will see a lot of police presence. 1,000 additional officers and National Guard deployed. A city and a nation on high alert. And good morning, america. We are live for our viewers in the west with the manhunt going on right now for this 28yearold ahmad khan ramami. This is the scene in elizabeth, new jersey right now. The fbi searching his home. He is believed to be the person seen in that Surveillance Video. That was chelsea on saturday night, and look at that scene now. An active crime scene in new york city. We also know at least four jersey and new york since saturday. Since the blast in chelsea injuring dozens and overnight, at least five people detained in new york who may be relatives of the suspect. The president has been briefed and is expected to speak sometime today. Look at the live view of penn station right now. A lot of nervous people commuting this morning, and police here are on high alert. So many powerful people here in new york city right now. We have Team Coverage across the country. Minnesota as well on saturday ni we begin with the latest on that suspect right there. Abcs linsey davis is on the scene. Good morning, linsey. Reporter lots of Police Involvement and Activity Still right here in this immediate vicinity. Last night, the two men who found the backpack with the five explosives in the trash can, they said they initially thought reporter this morning, the fbi has identified this man. A 28yearold naturalized u. S. Citizen. People say he should be considered armed and dangerous. This on the heels of the latest finding of a backpack in elizabeth, new jersey, containing devices. It exploded. Around 8 30 sunday night, two men found a backpack stuffed with a wire in a trash can. Just 15 miles outside of new york city. Police say when the men noticed the wires in the bag, they immediately turned it over to authorities. And as police attempted to disarm one of the five devices the exam by the robot, there is no Electronic Devices attached to the bomb or the suspected bomb i should say at this point. We cannot see under the package. But it does not expect at this time there are any Electronic Devices attached to it. Reporter the scare caused major delays for trains across the northeast. One amtrak train on its way to manhattan, delayed, stuck near trenton for hours. Were into hour four of a sitting amtrak train. Relatively good spirits, i think, considering the situation. Reporter this as, at the same time, just 12 miles away, five people were taken into custody on the verrazano bridge. This was sunday night during a traffic stop, trying to drive from Staten Island from brooklyn. Those five were potentially related to the bombing saturday night in manhattan. Shut down the run. Get them out of the boardwalk. Reporter and police in seaside park, new jersey, are still desperately searching for the person who left a pipe bomb race packed with over 1,000 runners over the weekend. I got some type of explosion in a garbage can. The race was delayed. Due to a massive turnout, and the pretimed bomb went off before the runners took off. Fortunately, no one was hurt. Authorities are in the process of removing a car from this location, and authorities are also saying that they believe that rahami may be related to those people taken into custody. Robin. These breaks are coming after an investigation. Brian ross is here with the manhunt for that suspect. Good morning, brian. Cameras and cell phones were used to identify the suspect. The search could not be more urgent to make sure what happened over the weekend does not happen again. Reporter the upper third of this Surveillance Video shows the moment of the blast. The impact seen here from inside the lobby of a fitness club. Explosion from a garbage pail. Reporter pedestrians fled the scene as police moved in. Then just four blocks away, what this morning appears to have been a major break in the case. Based on a tip from a local resident, police discovered a second, unexploded device. Build authorities say, just like the one that did go off, a Pressure Cooker with wires and a cell phone attached. I walked right by here. Theres a pot on the street with wires sticking out of it. And i think its probably a kids science experiment. Reporter the bomb squad used a robot to remove the device so they could examine it for fingerprints, dna and most importantly, the Registration Number of the cell phone, which Officials Say then led them to the suspects father. Right now, thats evidence for us. Could be crucial to our case. Reporter today, police and federal as will be tracking all calls made through the cell phone towers near the blast site. Off the cell tower, you can get information as to who called. And see who, you know, who may be calling each other. Its going to be very, very important. Reporter also important, efforts today to collect additional videos from the dozens of surveillance cameras in place on this block. Agents already have been studying the videos of residents walking calmly just before the blast. And then running for their lives afterwards. On the chance the bomber might be among them. Authorities tell abc news one video in their possession shows a man leaving an object near the dumpster, which was the scene of the first blast. Then that same man is seen at the site of the second bom it was a viont act. It was certainly a criminal act. It was a bombing. Reporter Officials Say they are also investigating whether that bombing ten hours earlier at a race in new jersey has any connections or similarities to the new york attack. The new jersey bomb, hidden in a garbage bin, was also triggered by a flip phone. Like the ones in new york. Although the bomb was constructed with led pipes, not a Pressure Cooker. What more can you tell us about the suspect can and the five people taken into custody . Relatives of rahami, and they are being questioned by the fbi. Where might he have fled . Thats important information. They are not suspects themselves, but they will know about where this young man could be. They want to talk to him. Detained, but not arrested. Thats right. This whole city on high alert this morning. President obama is here, and mayor bill de blasio stepping up security as the world gathers for the general assembly. Linzie janis is on the reporter good morning, george. The blast site behind me still very much an active crime scene this morning. Fbi investigators scouring it for clues. The mayor saying, there will be heightened security. And the mayor telling new yorkers to look out, expect armed officers across the city from the transit systems to the u. N. This morning, new york city on region. Citizens urged to stay vigilant. Counterterrorism officers, state and local police, and the National Guard patrolling major transit hubs. Well be doing enhanced bag checks. Throughout the city. Reporter saturday nights blast caught on this Surveillance Video circulating online. Sending pedestrians running and ducking for cover. A bomb just went off in new york. Reporter the 23rd street location, a bustling center of restaurants and night life. This Surveillance Video from a fitness club across the street, capturing the chaos. Watch again blast rocks the camera. There was big black clouds of like smoke. All of a sudden, we hear, boom [ explosion ] reporter so strong, it blew out windows of adjacent buildings and cars, sending shrapnel and glass flying. This woman bloodied and dazed. Helped by a bystander. Come with me. Im holding you. Okay . Come with me. You okay . Nothings going to happen. Reporter First Responders leading the injured, 29 in total, into ambulances. But all of them released by sunday. Among the injured, brenda abero leaving the hospital. The pregnant woman says the blast lifted the car she and her fiance were driving from the street, causing him to black out. The babys fine. Everything is fine with the baby. A mild concussion i have. Reporter new York Governor Andrew Cuomo surveyed the scene on sunday. He said theres extensive damage. It is this attack. George . It sure is. Linzie, thanks very much. And joining us now, new york city mayor, bill de blasio. Thank you for joining us. A terrifying weekend here in new york and new jersey. As we come on the air this monday morning, is the threat contained . George, at this point, look, i want to be clear. Nypd is in a very high state of vigilance. We have beefed up our presence all over this city. Checked in subways, and you will see a lot of nypd presence at key sites across the city. Im confident about what the nypd has out on the vestreets o new york city today. I think in the coming hours, well be able to say a lot more about what happened here specifically. We know a lot more than we did just 24 hours ago. Its certainly leaning more in the direction that this was a specific act of terror. And i think were going to have a lot more to share with the people. What i can say right now is we need the peoples help. Anyone who has information about that situation, we need it now. And the new York Police Department from my understanding is putting up a be on the lookout alert, and they want to release a most wanted poster for this 28yearold man. What more can you tell us about the suspect . Were going to have a lot more to say on that soon. But we want to publics help and as were going to be able to fill in the blanks about what we know, it is going to provide the public some information that the important thing here, again, thank you god no one was seriously seriously injured on saturday. And, people, i think, were wonderful in response to the crisis that happened on 23rd street. People helped each other out. Our First Responders did an amazing job. In the coming hours, as were able to put out more information, its important for the public to fully participate in helping us find out what we need to know. We did have some people who were paying attention in jersey last night, that were able to identify that bomb. Yesterday, you were reluctant to call it an act of terrorism. Are you prepared now to say it was . Well say more in the next few hours, but its definitely leaning in that direction, the more we know. What can you tell us about the five individuals detained apparently on the verrazanonarrows bridge last night . Heading to maybe Kennedy Airport . There was a car that came to the interest of the nypd. That car was followed. They were pulled over. Those individuals have been questioned. Theres definitely a situation there where were learning more information. And as we said, as well, you talked about the preparation because of the u. N. General assembly. You have president obama here today. You have got World Leaders gathering, and a lot of nervous new yorkers. The police out in force. But let me go back to the original question. Do you believe that there are more attacks possibly coming, or do you believe the threat is contained . I believe a couple of things. First, the amount of a capacity we have on the streets is extraordinary. We have the largest antiterror capacity of any force in the country. Youre going to see it. That is one of the ways to make sure there are no further situations. I think until we have pulled all the of the pieces of the case together, its premature to say what might happen next. I do feel that were getting information literally hour by hour. This situation is speeding up. Im very confident were going to find the individual or individuals involved based on but i think we have more work to do. Involved in chelsea, elizabeth, and seaside . Thats an open question. But one, again, that a lot more information is coming in. Its still premature to say if theres a connection. In the coming hours, well be able to tell you more. Mr. Mayor, thank you for your time this morning. Officials believe he was connected to all of bombings. Thats right. We turn and former nypd commissioner ray kelly who is here in the studio with us. Want to talk more about the investigation. Pierre, what is the status right now on the investigation . Reporter good morning, robin. Theres a growing belief of the bombings in seaside and chelsea are connected. Heres what sources are telling many e. All three bombs used flip phones to detonate. There were some differences in design. The seaside explosive device involved pipe bombs tied designed to detonate when the race began. The two bombs in chelsea on 23rd and 27th streets have signatures we have seen from bombmaking designs posted online, including in an al qaedainspired magazine. Both chelsea bombs used Christmas Lights for wiring, and one of the bombs had a label on it for tannerite. That can be used and bought in that Pressure Cooker bomb was described as being extremely heavy, containing shrapnel to maximize injuries. The way you describe those bombs like that, thats how you are able to determine who could be behind it. Reporter exactly. The leading theory is this is a serial bomber beginning to work, but also some investigators believe he had to have help. Ray, you ran the nypd for investigation . I think theyre getting close. We think were going to get a conclusion very soon. The key is the cell phone that did not explode on 27th street. Cell phones have a lot of data in them, and they will trace it back a new jersey, and perhaps it will be him or a member of his family. That led to the identificat leading to an apprehension very soon. Is there anything we can do to stay safe . Its a bustling city, and its a target. A terrorist target, and we want the public to be aware. Anything of untoward nature, that woman on 27th street, she helped solve this case. If you see something, say something. Absolute i. Thank you very much. Hillary clinton and donald trump both here today as well. Of course, this is 50 days before the election. Both are weighing in on the tax. Abcs tom llamas has the latest on that. Reporter before officials even declared that explosion in new york city a bombing, donald trump had heard enough. Just before i got off the plane, a bomb went off in new york. And nobody knows exactly whats going on. Reporter trump, preaching vigilance. We better get very, very tough. Just happened. So well find out. Bu thing thats going on. Reporter Hillary Clinton, who arrived in new york the night of the attack, also calling it a bombing before the official word was out. Ive been briefed about the bombings in new york and new jersey and the attack in minnesota. Obviously, we need to do everything we can to support our First Responders. Reporter clinton later calling them apparent terrorist attacks. But striking a much different tone than trump. To wait until you have information before making conclusions. Reporter and trumps running mate, mike pence, seeming to agree with clinton on at least this subject. It would not be appropriate for me to comment on an Ongoing Investigation other than to say we are thankful in our hearts that there was no loss of life. Reporter both hillary and trump did tweet out condolence messages. But trump also sent this out. Lets put it up on the screen. This happened last night. And clinton, americans have experienced more attacks at home than victories abroad. Time to change the playbook. Trump clearly trying to seize the moment. Well hear from president obama later today. Lets go the ginger. Reporter more than 2,200 acres burning. They have it 0 contained and really bad fire danger. Lets get to the select cities coming up, much more on the breaking news in new york and new jersey this morning. And the latest on the terrifying attack in minnesota. Isis claiming responsibility. We have live Team Coverage all morning long. And it was a big night at the emmys. Game of thrones, people v. O. J. Simpson. Won real big, lara was there for all of it. She joins us live next. It. She joins us live next. Does psoriasis ever get in the way of a touching moment . If you have moderate to severe psoriasis, you can embrace the chance of completely clear skin with taltz. Taltz is proven to give you a chance at completely clear skin. 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