Four people were injured Monday in the blast that rocked a subway station in the heart of Manhattan, firefighters said, but none of those injuries was life-threatening.
Police had said earlier the only injured person was a man detained in connection with the explosion, which took place in the station at the Port Authority bus terminal, not far from New York's iconic Times Square.
Early media reports said the blast came from a pipe bomb, and that several people were injured.
"The NYPD is responding to reports of an explosion of unknown origin at 42nd Street and 8th Ave, #Manhattan. The A, C and E line are being evacuated at this time. Info is preliminary, more when available," the New York police department wrote on their Twitter account.
President Donald Trump was briefed on the explosion, White House spokeswoman Sarah Huckabee Sanders wrote on Twitter.//AFP