A 29-year-old woman was sexually assaulted Sunday in Lake View on the North Side.
About 3:45 a.m., the woman was walking west in the 1000 block of West School Street when a man grabbed her from behind and told her he had a gun, Chicago police said.
He forced her to an alley and sexually assaulted her, police said.
The man was about 5-foot-7 and wore a black nylon over his head, police said. He was in his late 20s to early 30s.
Anyone with information is asked to call Area Three detectives at 312-744-8261.
