The attack happened Saturday in the 800 block of North Rockwell Street. View Full Caption DNAinfo/Quinn Ford

CHICAGO — Police are searching for a man after he attempted to kidnap a woman in Humboldt Park.

Around 5:30 p.m. Saturday, the man approached a woman pushing her infant baby in the 800 block of North Rockwell Street and grabbed her from behind by her hips and pulled her into an alley. A witness confronted the man giving the woman time to escape with her baby, police said.

The suspect is described as a black man around 17 years old, standing about 5-foot-7 and weighing between 190 to 200 pounds. He has a thick upper body and thin legs, police said. He was wearing a red T-shirt with black print on the back, black shorts with marijuana print and white gym shoes. He had a short afro, a chubby face and a goatee, police said.

Anyone with information on the attack should call Area Central detectives at 312-747-8380.