An active shooter incident occurred in Midtown Manhattan, New York, officials said. Here's what to know about 345 Park Ave.

The incident occurred in an office building located at 345 Park Ave., sources said. After apparently barricading himself on the 33rd floor, the suspect was found dead from what is believed to be a self-inflicted gunshot wound, sources added. Surveillance footage captured the suspect outside the building armed with a long gun, according to sources.

The Manhattan shooting took place in the area of the Blackstone building, at 345 Park Avenue, between 51st Street and 52nd Street.