CHICAGO (CBS)– Police released surveillance photos of a man and woman wanted for questioning following Saturday’s fatal stabbing on the CTA Red Line.

A 54-year-old man was fatally stabbed after getting into an argument with another man on the train.

The suspect got off at the Cermak stop and ran.

Anyone who recognizes the individuals in the photos is asked to contact Area Central Detectives at 312-747-8380, or to send a tip to cpdtip.com