The office building, located at 345 Park Avenue, houses some of the country’s top financial firms, including Blackstone, and the National Football League. According to the company's website, Blackstone stands as the world’s largest alternative asset manager, managing over $1 trillion in assets under management.

The glittering skyscraper where hundreds work became the scene of New York City’s deadliest gun attack in 25 years when a man entered the lobby and started shooting.

NEW YORK -- An active investigation is underway after a New York City police officer and civilian were shot in Midtown, Manhattan, according to police sources. The shooting happened outside 345 Park Ave., which is the building that contains Blackstone and the NFL headquarters.

Jessica Chen said she and dozens of others barricaded themselves in a conference room on the second floor of 345 Park Ave. after hearing shots fired in the building.

The deadly Park Avenue shooting happened at one of the the most exclusive addresses in Midtown Manhattan — the “Blackstone Building,” which is home to financial giant Blackstone, the NFL and

A shooting was reported near East 52nd Street and Park Avenue in Midtown Manhattan on Tuesday. A photo shared online shows a man holding a rifle outside 345 Park Avenue. The image is believed to show the shooter just before the incident,

The 27-year-old Nevada man opened fire at a New York City office building, killing at least four people and then himself.