A man exited a double parked BMW with an M4 rifle and then walked toward the skyscraper that is home to the headquarters of both the NFL and Blackstone, one of the world’s largest investment firms, as well as other tenants on Monday evening, according to surveillance video.

President Donald Trump said on Tuesday that he was briefed on the Monday night mass shooting in New York City, saying his “heart was with” the four people killed. “I trust our Law Enforcement Agencies to get to the bottom of why this crazed lunatic committed such a senseless act of violence,” he wrote in a Truth Social post.