A gunman opened fire in a busy New York office building on Monday, killing three people before turning the gun on himself.

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

Blackstone Inc.’s Wesley LePatner, a top executive in the firm’s $325 billion real estate business, was killed Monday when a gunman opened fire at the company’s Manhattan headquarters. She was 43.