By CBS 2 Chicago Staff

CHICAGO (CBS) — A man was shot and critically wounded at the Sox-35th CTA Red Line station Wednesday afternoon.

At 1:22 p.m., the victim – age unknown – was on a northbound Red Line train from the Garfield stop and he got off at Sox-35th, police said.

READ MORE: Chicago Weather Alert: Lake-Effect Snow On The Way With 6 To 8 Inches Possible In Some Areas; Winter Storm Warning Issued

An assailant who had been on the same train came up to the victim and shot him once in the neck, police said. The victim was taken to the University of Chicago Medical Center in critical condition.

The gunman was wearing a gray hoody, black jacket, blue jeans, and dark-colored gym shoes.

READ MORE: Two Men Shot Dead In Car In Ravenswood; Car Goes On To Crash And Catch Fire

No one was in custody Wednesday afternoon. Area One detectives were investigating.

The Chicago Transit Authority said Red Line trains were disrupted following the shooting. Trains were back up and running with delays by 3:30 p.m.

MORE NEWS: Pair Charged In Murder Of 8-Year-Old Melissa Ortega Denied Bail; Accused Teen Gunman Committed Three Previous Carjackings, Prosecutors Say

CHECK: CTA Updates

CBS 2 Chicago Staff