NEW YORK --Five people were taken into custody Sunday night in connection with a bombing in New York City's Chelsea neighborhood on Saturday that injured 29, a source said.
At 8:45 p.m. Sunday, the five men were stopped in a vehicle by the FBI and New York Police Department, who were seeking a vehicle of interest in the bombing investigation.
No charges had been filed Sunday night
The car was stopped on the Belt Parkway. The men were headed from Staten Island to Brooklyn on the Verrazano-Narrows Bridge.
Earlier Sunday, investigators scrambled to find out who planted a bomb that rocked a bustling New York City neighborhood. They scoured shrapnel, forensic traces and surveillance video for any link to an unexploded pressure-cooker device found a few blocks away.
Meanwhile, all of the injured have been released from local hospitals.
Huge explosion in Chelsea blew this dumpster ... pic.twitter.com/1lSIGjRyC8— Chris Duffy (@voicehalf) September 18, 2016
"We just know there was a bombing," Mayor Bill de Blasio said at briefing at New York Police Department's headquarters. "That much we do know."
Democratic Gov. Andrew Cuomo, who toured the site of the blast in Manhattan's Chelsea neighborhood, said there didn't appear to be any link to international terrorism. He said a second device found blocks away from the bombing appeared "similar in design" to the first.
That device - described by a law enforcement official as a pressure cooker with wires and a cellphone attached to it - was removed early Sunday morning by a bomb squad robot and is being examined by forensic experts.
The official spoke to The Associated Press on condition of anonymity because the official wasn't authorized to speak publicly about an ongoing investigation.
A pipe bomb explosion in Seaside Park, New Jersey, before a charity 5K race to benefit Marines and sailors earlier Saturday didn't appear to be connected to the Manhattan bombing, and each bomb contained different materials, officials said, but added that they weren't ruling anything out yet. The race was canceled and no one was injured.
The New Jersey device contained evidence of a black powder, while the device that exploded in Manhattan had residue from an explosive called Tannerite, said a federal law enforcement official.
The official wasn't authorized to discuss details of the ongoing investigation and spoke to the AP on the condition of anonymity.
Tannerite is often used in target shooting to mark a shot with a cloud of smoke and small explosion.
The bombing rocked the city's Chelsea neighborhood, a mostly residential part of Manhattan's west side known for its art galleries and large gay population.
Witnesses described hearing a deafening blast, and surveillance video footage captured images of nearby windows being blown out by the explosion as people sprinted away from the scene.
"It was extremely loud, almost like thunder but louder," said Rudy Alcide, a bouncer at a nightclub near the blast.
Members of the FBI's Joint Terrorism Task Force are investigating the blast along with New York Police Department detectives, fire marshals and other federal investigators. As a precaution, Cuomo said he was deploying an additional 1,000 state troopers and members of the National Guard throughout New York City.
The first device, which exploded on West 23rd Street at about 8:30 p.m., appeared to have been caused by an improvised explosive device placed inside a toolbox in front of a building undergoing construction, the law enforcement official said.
The second device, found later inside a plastic bag on West 27th Street, appeared to be a pressure cooker with wiring and a cellphone attached to it, the official said.
Federal investigators in Quantico, Va., will examine evidence from the explosions in New York and New Jersey.
In Chicago, police are being told to stay vigilant, but Superintendent Eddie Johnson said there is no threat to Chicago at this time.
The news from New York City rippled across the campaign trail Sunday with both presidential candidates commenting on the bombing.
"We better get very tough folks," said presidential candidate Donald Trump at a rally in Colorado. "We better get very, very tough."
Presidential candidate Hillary Clinton took a more cautious approach while in New York on Sunday.
"We have to let this investigation unfold," she said. "I'll have more to say about it when we actually know some facts."