Several people were shot at a subway station in Brooklyn, New York, Tuesday Morning, April 12.

A New York City Police Department spokesperson tells Rolling Stone there are “multiple people injured,” but that number “keeps changing.” So far, however, all the victims are stable.

According to preliminary reports, at least five people were shot. A New York City Fire Department spokesperson told NBC News that 13 people were injured in the mayhem, though it was unclear how many of them were shot. Police also said they were seeking a suspect identified only as a man wearing a gas mask and an orange construction vest.

The NYPD spokesperson added that this is “still an active investigation.” A press conference is expected to take place later today.

Police officers were alerted to the incident at around 8:30 a.m. ET, receiving reports of smoke inside the subway station. First responders also found several undetonated devices around the station, which is located in the Sunset Park neighborhood of Brooklyn. On Twitter, the NYPD confirmed there were “NO active explosive devices at this time” at the scene.

One witness told The New York Post that she “lost count” of the numbers of rounds the shooter fired off and saw the man drop “some kind of cylinder that sparked at the top… I thought he was an MTA worker at first because I was like, I didn’t like pay too much attention. You know? You’ve got the orange on.”

This story is developing…