Ahmad Khan Rahami, 28, of Elizabeth, NJ, is wanted for questioning in connection to Saturday's blast.
The FBI put out a wanted poster for a man they want to question in connection to Saturday's Chelsea bombing — after taking a group of men in for questioning during a car stop on the Belt Parkway Sunday night, according to reports and FBI officials.
The traffic stop came hours after a backpack filled with explosives was found in the New Jersey transit station in Elizabeth, NJ, officials said.
Two men inside the station noticed the backpack inside a garbage can and opened it to see if anything valuable was inside, Elizabeth mayor Chris Bollwage told reporters.
When the men saw explosives and wires, they dropped the bag and called police, he said, according to reports.
A bomb-detonating robot tasked with disabling the bombs accidentally detonated one of them, he said.
"The robots that were going in to disarm it cut a wire and it exploded," Mayor Bollwage told NY1. "I know there were other devices. I don't know what they're made of."
He added that the all the bomb fragments "are going to have to be picked up so the FBI can investigate them."
Sunday's discovery shut down train service along the Northeast Corridor overnight, and while service had been restored by the Monday morning rush hour, delays were expected to continue throughout the day Monday, officials said.
"Service was suspended Sunday evening due to police activity near the Elizabeth, NJ station. Passengers should be prepared for the possibility of additional cancellations and delays throughout the day Monday," Amtrak officials said. "Amtrak Acela Express, Northeast Regional and other services will operate Monday with some schedule modifications."
"Any additional schedule modifications will be announced as warranted."