Multiple casualties as gunman opened fire in the lobby of the midtown Manhattan building on Park Avenue that is home to the Blackstone investment firm and other corporations before moving to other floors.

Blackstone employee Wesley LePatner was also killed, the company said in a statement. She was the global head of Core+ Real Estate and the chief executive officer of Blackstone Real Estate Income Trust.

This is a breaking news story. For latest updates, please go to our live blog. An NYPD officer and at least four other victims were killed in a shooting at an office skyscraper in midtown Manhattan Monday evening,