A man stalked through a Manhattan office tower firing a rifle, killing four people, including a New York City police officer, and wounding a fifth before taking his own life, officials said.

Wesley LePatner, a top Blackstone executive and advocate for workplace diversity, was among four people killed in a mass shooting at the firm’s Park Avenue office.

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