A man on a bicycle sexually assaulted a girl in a residential alley near the 1100 block of South Lyman Avenue on Wednesday, June 24, grabbing her from behind. The suspect remains at large.

The Oak Park Police Department said in a community alert published Thursday, June 25, that officers responded to the alley between Lyman and Taylor avenues at approximately 12:24 p.m. after the assault was reported. The man grabbed the juvenile from behind, placed his hand up her shorts, and fled on a gray bicycle.

Officers searched the area but did not locate the suspect.

He is described as a male in his 20s, possibly of Hispanic or Indian descent, wearing a black shirt and colorful shorts, riding a gray-colored bicycle.

Detectives have been assigned to the case. Officers have increased patrols in the area since Wednesday, according to the department's alert.

The department is asking residents to submit any video footage that may have captured the suspect or vehicles leaving the area at www.oak-park.us/policevideo.

Anyone with information can contact Detective Smith of the Investigations Division at 708-358-5545 or [email protected], call the department's tip line at 708-434-1636, or submit an anonymous tip at www.oak-park.us/crimetip.

If you or someone you know needs support, the YWCA Metropolitan Chicago operates a 24-hour rape crisis hotline serving Oak Park and the western suburbs at 888-293-2080. Resilience offers a 24-hour bilingual crisis line at 312-443-9603. The RAINN National Sexual Assault Hotline is available around the clock at 800-656-4673 or at rainn.org/get-help.