Authorities on High Alert After Multiple Explosive Devices Found in NYC Area

Authorities scrambled Monday to put the pieces together after at least three explosive devices were discovered in separate locations in the New York City area over the weekend.
3:54 | 09/19/16

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Transcript for Authorities on High Alert After Multiple Explosive Devices Found in NYC Area
We have major developments in the strain of explosive devices in new York and New Jersey first a device found last night near railroad station in Elizabeth, New Jersey exploded overnight. It was one of five devices discovered inside a backpack that was in a garbage can. It detonated as a bomb squad was working to disarm it. So that happen around the same time get this at five people were taken into custody in connection with Saturday's explosion in Manhattan. The scene there from Elizabeth, New Jersey though at this hour. Now those five people no were picked up during a traffic stop at the Verrazano Bridge. And this is a scene this is the scene on the Belt Parkway last night injuring that investigation where those five people. Were taken into custody just for questioning and it's not clear what their connection might event. And we also have video from inside a restaurant just a few hundred feet away from the Manhattan blast. No one inside the restaurant was hurt. But when listening to the blast you can hear it very clearly the raiders today surprisingly. Com watching that video you can understand though why somebody people in the New York City area were quite on edge and remain on edge. All of this happening as you have the UN general assembly set to begin in just a few hours. So normally tight security has been increased even more as world leaders including President Obama arrive in New York City. ABC's ray Raman and he joins us from the scene of Saturday's bombing in Manhattan's Chelsea neighborhood little more than a mile from the UN red. That's absolutely right time tenants in fact security is very tight here in this area. Ahead of those world leaders come here we do know multiple law enforcement agencies are telling ABC news. But the explosion that happened here in Manhattan actually right behind me in the one that happened seaside park New Jersey on Saturday. Possibly possibly could be connect did. Based upon what appears to be similar cellphones used to detonate those two devices. And we also know that those arrestor happening right now or those who those five individuals are being questioned by FBI agents right now. The New York metro area. On edge this morning another device discovered overnight New Jersey just miles away from New York City. Five devices found inside of a backpack one of them exploded. The bomb experts attempted to disarm. This while authorities say it was right near the Verrazano Bridge late Sunday night where FBI agents stopped what they call a vehicle of interest. Connected to the bombings. Federal authorities trying to get a clearer picture as to who's responsible for placing the device and that Manhattan neighborhood. The explosion the chaos all happening on a balmy Saturday night law enforcement on the hunt. The evidence we've collected is being taken to our lab in Quantico for review. And we are following every viable lead as we continue to work jointly with the NYPD. Piece by piece invest gators are closely analyzing every particle of debris laughed. Including looking closely at this dumpster twisted and mangled in the aftermath of the explosion. It was louder and then on there but I could Heatley was just a large room where. The building's tenants took. I got probably orient. But at Harvard kid. Meanwhile federal authorities looking into whether a pipe bomb which exploded in this trash can sixty miles away in New Jersey. Is related to the bombings in New York City the word is that both devices are pressure cookers who that they. We're certainly similar in construct. The explosion and the stabbing Rampage over the weekend in the Minnesota mall. Which invest gators are calling a potential act of terrorism sparking renewed fears across the country. And in light and those new fears we understand law enforcement officials here in your city are urging everyone to be vigilant and just. And to report anything suspicious here in the area Diane can.

This transcript has been automatically generated and may not be 100% accurate.

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