Crews were called near 1000 N. Lake Shore Drive about 5:40 p.m. because of an unresponsive person in the water, said Officer Bari Lemmon, a Chicago police spokeswoman. Fire crews were called to the area and found a body, according to the Chicago Fire Department's media office.
Chicago police were able to bring the man's body out of the lake a few hours later, and detectives were conducting a death investigation.
Fire Department divers were initially at the scene, and video from the scene showed a Fire Department boat, Chicago police boats, and police and fire crews north of Oak Street Beach along the concrete walkway.