Troy Johnson, 54, was stabbed to death on a CTA train near the Cermak-Chinatown stop, officials said.

A man was stabbed to death Saturday on a CTA Red Line train on the South Side, according to police.

About 2:53 p.m., Troy Johnson, 54, was riding a train south near the 100 block of West Cermak Road when he got into an argument with another person on the train, Chicago police and the Cook County medical examiner’s office said.

The person took out a knife and stabbed Johnson multiple times, then got off the train at the Cermak-Chinatown stop and fled south on Wentworth, police said. Johnson was pronounced dead on the scene.

An autopsy conducted Sunday ruled Johnson’s death a homicide by multiple stab wounds, the medical examiner’s office said.

Red Line trains were bypassing the Cermak-Chinatown station as police investigated but resumed normal service about 7:45 p.m., the CTA said.

No one was in custody as of Sunday afternoon.