At least 16 people have been injured in a shooting during morning rush hour at a New York subway station.
Police said shots were fired at the 36th Street station in Sunset Park at 08:30 local time (12:30 GMT) .
Images from the scene showed bloodied passengers lying on the floor of the smoke-filled station.
The attacker fled the station, and witnesses quoted in US media described a man wearing an orange construction vest and gas mask.
The suspect threw a smoke bomb to distract the crowd, police sources told NBC News.
Most of those who were are being treated for injuries were shot, police said, including one victim who was critically wounded.
Others are being treated for smoke inhalation and injuries sustained in the initial panic.
No motive for the attack has yet been given. People have been advised to stay away from the area.
Editing by Omotola Oguneye