Police this week sought the public’s help in identifying and tracking down a suspect who stabbed a man on a Metro Expo Line train in the Baldwin Hills area, inflicting non-life-threatening injuries in what appeared to be an unprovoked attack.

The victim was stabbed once in the chest about 5:20 p.m. Monday on an eastbound Metro train that had come to a stop at the La Cienega/Jefferson Station at 5664 W. Jefferson Blvd., according to the Los Angeles Police Department.

The suspect attacked without warning and then fled the train, while both the victim and a witness continued east to the Expo/La Brea Station at the intersection of Exposition Boulevard and La Brea Avenue in the West Adams area, where paramedics responded and took the wounded man to a hospital, police said.

The unidentified victim was treated for a non-life-threatening laceration to his chest, according to the LAPD.

The suspect was described as a man about 50 who was wearing all black clothing.

Anyone with information about the attack or the suspect was urged to call LAPD Detective Justin Fuller at (213) 485-9801.

During non-business hours, calls should be directed to (877) LAPD-24-7. Anonymous tips can be submitted through Crime Stoppers at (800) 222-TIPS or lacrimestoppers.org.