A woman was sexually assaulted in a vacant lot in Lake View on the North Side Monday.
A man approached her about 2:30 a.m. in the 600 block of West Wellington Avenue, Chicago police said.
He took the woman to a dirt lot and sexually assaulted her, police said. The man fled west on Wellington toward Clark Street.
The man was described as 20 to 29 years old, 5-foot-6 to 5-foot-7 and 160-170 pounds. He had short black hair and was wearing all dark clothing.
Anyone with information can Area Three detectives at 312-744-8200.