Chicago (CBS) — Police are looking for a man who punched a pregnant woman on a CTA train.

Community activists are handing out flyers hoping someone will recognize the offender and turn him in.

A 25-year-old woman was on a Red Line train Wednesday when, police say, a man approached her and started swearing at her. Then the man hit her in the face and body.

Surveillance cameras captured these pictures of the suspect.

(Credit: CPD)

The man got off the train at the Addison station and got away.

The offender is described as an 30 to 40-year-old, African-American man, about 5 feet 9 inches tall and weighing 150 to 180 pounds. He was wearing a gray wool hat, a brown winter jacket and carrying a green bag.

Crisis responder Andrew Holmes said the woman has been to the hospital several times due to complications she suffered from the attack.