At least 13 people have been injured, including five from gunfire, in an incident during morning rush hour at a New York subway station.

Some media reports mentioned that the three were dead in the shooting.

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.