Jessica Chen was watching a presentation on the second floor of 345 Park Ave. in Midtown Manhattan on Monday evening with about 150 people when she said she heard multiple gunshots fired "in quick succession" on the floor below her.

New York and federal officials warned of an "active shooter situation" near on office building near Midtown Manhattan Monday.

Officer workers’ frantic attempts to barricade doors inside the New York building that was the scene of a shooting rampage on Monday has been revealed. A dramatic photo from an employee at investment company Blackstone and sent to Eyewitness News shows office furniture piled against a door in an effort to stop the shooter from entering.

A lone gunman walked into a midtown Manhattan office building Monday and opened fire, killing five people, including an NYPD officer, before turning the gun on himself.

The residence of Shane Tamura, identified as the gunman in the fatal shooting at a Manhattan office building in New York City and who was killed by a self-inflicted gunshot wound is seen on Monday, July 28, 2025 in Las Vegas, Nev. (AP Photo/Ty O’Neil)

New York City police converged on a Park Avenue skyscraper in midtown Manhattan where gunshots were reported fired on Monday inside the tower housing offices of several financial firms and the headquarters of the National Football League,