Police are hunting a gunman in orange construction vest and gas mask – as undetonated explosives are found.
At least 13 people have been injured, including five from gunfire. in an incident during morning rush hour at a New York subway station.
According to police, shots were fired at the 36th Street station in Sunset Park around 08:30 local time (12:30 GMT) on Tuesday.
Photos from the scene show bloodied passengers lying on the station floor. Undetonated explosive devices were also found on the scene.
The suspected gunman is on the loose.
Described as a man in an orange construction vest and possibly wearing a gas mask, he is believed to have fled the scene. No motive for his actions has yet been identified.
A spokesman for Mayor Eric Adams called on New Yorkers “to stay away from this area for their safety and so that first responders can help those in need and investigate”.
At least four train lines are also said to be delayed in both directions.
Law enforcement sources say the suspect opened fire from the platform and threw a smoke bomb inside an R line train that had just pulled into the station.
New York’s fire department told the BBC it originally received a call about smoke inside the station.
But officials arrived to find several people shot and injured.
Police have said there are now no active explosive devices inside the station.