At least five people were shot and injured Tuesday at a New York City subway station during a morning rush hour attack that left wounded commuters bleeding on a train platform and police searching for the shooter.

At least 13 people were hurt, but only five were shot, when fire personnel responded to reports of smoke at the 36th Street station in Brooklyn.

According to multiple law enforcement sources briefed on the investigation, the suspect who fled was wearing a construction vest and a gas mask.

The air in the station was filled with smoke and people were tending to bloodied passengers on the floor. Multiple smoke devices were found on the scene, but the police department said there were no active explosives at this time.

There were at least 11 people in the hospitals.

The subway door opened into a mess. Sam Carcamo told a radio station that he saw a huge billow of smoke coming out of the train after the door opened.

A bystander video shows people lying on the subway platform, with small puddles of blood, as a loudspeaker announcement tells everyone to get on a train. A person is laying on the floor in a subway car. A police officer yelled "Let's go!" outside the station. Get out of the way!

During the morning rush hour, trains servicing that station were delayed.

The office of New York City Mayor Eric Adams did not have more information. Adams was briefed at the mayor's residence Tuesday morning.

The subway line that runs through south Brooklyn is about a 15-minute train ride to Manhattan. Sunset Park High School across the street was locked down.

Danny Mastrogiorgio of Brooklyn ran up the stairs of the 25th Street subway station in panic after he saw a crush of passengers. He said at least two had leg injuries.

He told The Associated Press that it was insane.

Allan Lee was running his business when a group of police cars and fire vehicles arrived on the block.

He told the AP that they ushered people on the block to the adjacent block and then closed off the subway entrance near the cafe's door. He was certain it was not an everyday subway problem when he saw bomb squad officers and dogs.

Kathy Hochul said in a statement that her office would work with the transit authority and police department as the investigation continued. White House senior staff were in touch with Adams and the NYPD Commissioner after Biden was briefed on the latest developments.

Police officers canvassed 4th Avenue, the station's cross street, asking witnesses if they were on the train. A sea of emergency lights was visible from at least a dozen blocks away, where a police cordon was set up.

New York City has been 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 800-273-3217 The death of a woman in front of a train in January was one of the most shocking.

Adams, a Democrat, has made cracking down on crime a focus of his early administration and pledged to send more police officers into stations and platforms for regular patrols. It wasn't immediately clear if officers had already been inside the station.

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Associated Press reporters in Washington and New York contributed to the report.

We can be reached at letters@time.com.