Gunman Kills 4, Including an Officer, at Manhattan Offices

A gunman killed at least four people at a Manhattan office building on Monday evening, the AP reports, one of them an off-duty New York City police officer shot while exchanging fire with the shooter in the lobby, NBC News reports. The suspect then disappeared into the skyscraper, and panicked employees ran into the streets screaming. Police said they later found the gunman on the building's 33rd floor, dead of a self-inflicted gunshot wound, and they described him as a 27-year-old man from Nevada who acted alone. The Park Avenue building houses the offices of some of major financial firms, per the AP, as well as the National Football League.

• Video: Security footage showed a gunman walking outside the building, carrying a long gun, before the shooting began. Later, long lines of people could be seen in local news videos evacuating the building with their hands above their heads, per the AP. Some of the evacuees broke into a run, per the New York Times.
• Employees flee: Darin Laing, 37, who works in the building, had just walked out with a colleague for a dinner break when he heard about 20 gunshots. When he looked back, Laing saw what seemed to be smoke coming from the building, per the Times. Then he heard screaming and crying as people poured out the doors.

• The site: The 634-foot skyscraper, 345 Park Ave., occupies an entire block and has its own ZIP code. It's near Rockefeller Center and Central Park. In addition to the NFL's headquarters, the building holds the offices of Blackstone, Deutsche Bank, JP Morgan, and the consulate general of Ireland. Nearby office buildings also went into lockdown.