CHICAGO (CBS) — Chicago police warned women in the Lincoln Park neighborhood to be on alert, after a sexual assault over the weekend, just blocks away from the DePaul University campus.

Police said, sometime late Saturday night or early Sunday morning, a 24-year-old woman was attacked while she was walking in the 2500 block of North Lincoln Avenue.

The woman told police a man grabbed her by the hand and began fondling her, then dragged her into an alley and raped her.

Police said the suspect ran away after the attack.

A community alert warned people in the area to walk in pairs, and to be aware of their surroundings.

Anyone who might have information on the attack should call Area North detectives at 312-744-8200. Anonymous tips can be submitted to tipsoft.com.