A man was stabbed during an argument on a CTA Red Line train Wednesday night near Chatham.
The attack occurred about 10:40 p.m. near the first block of West 79th Street, Chicago police said.
The man, 33, started arguing with someone who pulled out a knife and stabbed him in the head, police said. He was taken to the University of Chicago Medical Center in fair condition,
Officers recovered a knife at the scene, according to police.
No arrests were reported.