A knife-wielding man attacked a 48-year-old man sitting on a CTA platform in the Loop early Tuesday.
The victim was sitting on a bench when the attacker displayed a knife and stabbed him in the abdomen about 3:30 a.m. in the 100 block of North Clark Street, police said.
He was taken to Northwestern Memorial Hospital in good condition and no one was arrested, police said.
Area 3 detectives are investigating.