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As many as five people were taken into FBI custody Sunday night in connection with Saturday's explosion in Manhattan's Chelsea neighborhood, after a traffic stop on the Belt Parkway in Brooklyn, just off the Verrazano-Narrows Bridge, which connects the New York City boroughs of Brooklyn and Staten Island, law enforcement sources told ABC News.

The FBI's New York field office said a traffic stop was conducted but did not elaborate. "We did a traffic stop of a vehicle of interest in the investigation. No one has been charged with any crime. The investigation is continuing," read a tweet from the office.

According to The Associated Press, the individuals were taken to an FBI building in lower Manhattan to be questioned.

The FBI may be looking for additional suspects, the sources told ABC News.

As ABC News previously reported, multiple law enforcement officials told ABC News that investigators are exploring the possibility that the New York explosion and one earlier that day in New Jersey are linked to the same bomber or bombers, because of what appear to be similar types of cellphones.

On Sunday night multiple law enforcement officials told ABC News that police would like to talk to a male seen on surveillance images recovered from both 23rd Street in Manhattan, where the explosion occurred, and 27th Street, where an unexploded second device was found.

Police have not identified the man and have not characterized him as a person of interest. It is also unknown if that man is related in any way to those taken into custody Sunday night.

The explosive device in New Jersey and the one that caused the blast in New York City were both set off with cellphones, according to two law enforcement officials who have been briefed on the case. The unexploded device also had a cellphone connected to it.

Authorities cautioned that this is only a line of inquiry and not a conclusion. The probes remain separate investigations, the FBI and officials in New York said.

"Just because you have one thing in common doesn't mean the devices are similar," one official told ABC News.

The explosive devices looked very different: The one in New Jersey consisted of pipe bombs, and the one in New York was not.

The video below was posted by Terri restaurant on West 23rd Street, 176 yards east of where the explosion took place. A boom is heard.

New York City Mayor http://abcnews.go.com/topics/news/us/bill-de-blasio.htm