Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

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

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the ...

Bankers and traders returned to work on a somber Tuesday morning in Midtown Manhattan, New York's financial epicenter, one ...

Wesley LePatner, 43, was among the four people killed by a gunman who stormed the Park Avenue building where she worked on ...

Investment giant Blackstone Inc said on Tuesday that a senior executive was among the people killed when a gunman, carrying ...

This is a breaking news story. For latest updates, please go to our live blog. An NYPD officer and at least four other ...

A New York police officer, a “beloved” security guard, a young Cornell graduate and a senior executive with investment firm ...

The New York City office building at 345 Park Avenue where a deadly shooting occurred serves is the headquarters of ...

Investigators are combing through evidence in the wake of New York City’s deadliest mass shooting since 2000, trying to ...

A man carrying a high-powered rifle shot and killed four people, including an off-duty police officer working security in Midtown Manhattan, sources told ABC News.

Terrifying photos appear to show Blackstone employees inside 345 Park Avenue barricading their office door with towering furniture that reached the ceiling.