An NYPD officer, a Blackstone executive, a Rudin Management associate and a security guard were killed in the shooting at Manhattan's 345 Park Avenue.

NEW YORK CITY — A Yale University graduate working at the Blackstone investment firm was among the four people killed Monday when a gunman opened fire at an office building in Manhattan. The company identified the woman who died as Wesley LePatner in a statement, The Associated Press reported.

Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday. The injured victim was an employee at the NFL, according to NFL Commissioner Roger Goodell. Here's what we know about the four people killed: