Attempted sex assault reported on NW Side

October 29, 2010 5:42:02 AM PDT
Police are searching for a man who they say tried to sexually assault a teenage girl on Chicago's Northwest Side Tuesday afternoon.Police say the offender grabbed the 16-year-old victim from behind and pushed her into an alley in the 2400-block of North Lavergne. He then slammed her head into a building and tried to remove her clothing. But the victim managed to escape.

Police only have a vague description of the offender.