The New York City office building that was the site of a mass shooting Monday had significant security measures in place.

The gunman who killed four people, including an NYPD officer, inside a Manhattan office building Monday evening left a note ...

Blackstone told employees on Friday it will reopen its New York headquarters on August 4, a week after shuttering it in the ...

Four people died after a gunman opened fire in a Manhattan office building, and security footage showed the shooter calmly ...

The NFL season kicked off at the annual Hall of Fame game with a moment of silence for the four people killed earlier this ...

A shooting Monday at an office building in New York City that is home to the Blackstone investment firm and the NFL left four ...

The alleged gunman at a shooting rampage in a midtown Manhattan office building was identified as 27-year-old Shane Tamura, ...

New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office ...

The owner of a private security business on Park Avenue said he questions how a shooter got so far into a Midtown office ...

Follow along for live updates on the New York City shooting, where police investigate motive after five people, including the ...

The NYPD continues to work with investigators across the country to learn more about the gunman in Monday's deadly Midtown ...

The NYC shooting victims, Didarul Islam, Wesley LePatner, Aland Etienne, and Julia Hyman, were killed by a gunman inside ...