CHICAGO (STMW) — Police are looking for a man who tried to lure two teenage girls into a van Tuesday night in the West Humboldt Park neighborhood on the West Side.

The girls, ages 13 and 15, were walking their dog near Chicago and Keystone avenues about 7:10 p.m. when a white van with green stripes pulled alongside them, according to a community alert from Chicago Police. The driver’s side window rolled down, partially covering the man’s face, and he yelled out that he had their sister in the van and asked if they wanted to see her.

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The man then reached behind him as if he were going to open the door, at which point the girls ran away westbound on Chicago, police said. The man drove the van west and pulled into an alley, attempting to block the girls’ path at Chicago and Karlov.

The girls then ran toward a group of youths and the man drove away, police said.

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The suspect is described as a black man in his early to mid-20s with a dark complexion, according to police. He was driving a full-sized white conversion van with green stripes and rims on the front wheels.

Anyone with information about the incident is asked to contact Area North detectives at (312) 744-8200.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2016. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)