CHICAGO (CBS) — Do you recognize the man in the photos on this Chicago Police Department flyer?

cta attack 4 Man Wanted For Punching Woman On Red Line; Victim Might Go Blind

A Chicago Police Department flyer shows the man wanted for punching a senior citizen on a CTA Red Line train on June 14, 2018, causing a serious eye injury. (Credit: Chicago Police)

Investigators say he punched a female senior citizen on a Howard-bound Red Line train near the Jarvis station on Thursday, causing a serious eye injury.

“We learned today that our victim may lose her eyesight as a result,” Police Department spokesman Anthony Guglielmi tweeted Friday afternoon.

Police said the woman was on her way home to Evanston at the time.

CTA surveillance images show the man cocking his fist as the woman is sitting on a seat, reading a Kindle. The attacker was dressed in jeans, a blue T-shirt with the word Illinois in script lettering, and brown shoes with a white upper heel. He was carrying a black backpack.

Police described him as an African American man, 5-foot-6 to 5-foot-9, 160 to 180 pounds, with short black hair.

Anyone who recognizes the man should call Area North detectives at 312-744-8266. Anonymous tips also can be submitted to tipsoft.com or cpdtip.com.