FBI called NYPD for back-up.

CBS Local is reporting 5 people now being questioned.

Update:

They may have been trying to flee to the airport. NY Daily News is reporting they had weapons as well.

Via NY Post:

FBI agents arrested five men who may be connected to Saturday’s bombing in Chelsea after stopping their car in Brooklyn, sources said.

The men were heading over the Verrazano Bridge from Staten Island when they were stopped Sunday night.

Sources said the FBI suspected the men may have had a role in the bombing and were questioning them at the FBI headquarters in Manhattan.

It is believed the men, who live in New Jersey, were heading to the airport when they were busted.