July 28 (UPI) -- At least four people were killed, including an off-duty police officer, and six others were injured in a shooting Monday evening at a New York City skyscraper housing the corporate offices of the National Football League and Blackstone.

The gunman, who was identified by police as a 27-year-old from Las Vegas, stormed the Park Avenue skyscraper lobby just before 6:30 p.m. EDT. According to police, the man opened fire, before barricading himself on the 33rd floor, where he was found dead of an apparent self-inflicted wound.

"The scene has been contained and the lone shooter has been neutralized," announced NYPD Commissioner Jessica Tisch. The alleged shooter's body was found next to a Palmetto State Armory AR-15 assault rifle.

Police released a photo of the man walking into the building and carrying a long gun in the crowded area just blocks from the Museum of Modern Art and Grand Central Terminal. Officers said they believed the gunman fired at the police officer, who was working private security, as he entered the lobby.

Related