Police warn of sexual assault on South Side

A knife-welding man sexually assaulted a woman this morning in the city's Marquette Park neighborhood.
About 6:30 a.m., an 18-year-old woman was on the 2400 block of West 65th Street when she was approached from behind by a man who was armed with a knife. The man forced her into an alley where he assaulted her before fleeing the scene.
Police described the attacker as a black man between the ages of 30 and 40, 5-foot-11 to 6-foot-2, and 180 to 190 pounds, with black hair and a dark complexion.