At least three people, including a New York City police officer, were killed in a shooting at a midtown Manhattan office building that houses some of the country’s top financial firms and the NFL, the Associated Press reported.

The gunman died from a self-inflicted gunshot wound, according to authorities. The New York Times, citing law enforcement sources, identified the gunman as Shane Devon Tamura, 27, of Las Vegas.

A photograph posted online showed a Black man carrying a rifle, striding along a city street. He was wearing sunglasses, a blue jacket, black trousers and sneakers.

CNN cited law enforcement officials as saying the man had a concealed-carry license for a handgun.

New York City Police Department officers respond to a deadly shooting in midtown Manhattan on July 28. (Photo by TIMOTHY A. CLARY/AFP via Getty Images) New York City Police Department officers respond to a deadly shooting in midtown Manhattan on July 28. (Photo by TIMOTHY A. CLARY/AFP via Getty Images)

This is a developing story that will be updated with additional information.