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.

NEW YORK, NY - Multiple people have been killed, including one officer, after gunfire erupted in Midtown Manhattan on Monday afternoon, police sources told FOX 5 New York. Here's a live update on what's happening in New York. All time stamps are based on East Coast times. Four people were shot and killed in Midtown Manhattan on Monday.