Several people were shot and at least 13 were injured on Tuesday in the 36th Street subway station in Brooklyn's Sunset Park neighborhood, New York City, the city's fire department said.

The shootings occurred during the morning commute. A gunman filled a rush-hour subway train with smoke and shot multiple people, leaving wounded commuters bleeding on a Brooklyn platform as others ran screaming, authorities said.

CNN and other media reported that at least five people were shot, citing sources in the New York Fire Department. Police are still searching for the suspect.

AP reported that a train rider’s video shows smoke and people pouring out of a subway car. Wails erupt as passengers run for an exit as a few others limp off the train. In other video and photos from the scene, people tend to bloodied passengers lying on the platform, some amid what appear to be small puddles of blood, and another person is on the floor of a subway car.

Preliminary information indicates that the suspect, a man wearing a construction vest and a gas mask.

Authorities shut down blocks around the 36th Street subway station and another nearby station. The immediate area was crossed off with yellow crime scene tape.

The fire department initially said that undetonated explosive devices were found at the station, police later said in a Tweet that there were no active explosive devices.

-Ap/Reuters