A woman was seriously injured Sunday afternoon when a man she didn’t know pushed her onto the train tracks at the CTA Red Line Belmont station in the Lake View neighborhood on the North Side, according to Chicago Police.

The 48-year-old woman was standing on the platform at 4:07 p.m. when she confronted a man who was publicly urinating on the tracks. When she turned to walk away, the man pushed her onto the tracks, police said.

Police released a surveillance photo and description of the suspect to try an identify him. He was described as a 5-foot-9 black man between the ages of 35 and 50, weighing about 200 pounds.

He was wearing a black and camouflage jacket, dark sweatpants with a white Puma logo and a green Chicago Cubs baseball hat at the time of the attack, police said.

The woman was taken to Illinois Masonic Medical Medical Center in serious condition.

Anyone with information is asked to contact Area North detectives (312) 744-8261.