A 20-year-old man was shot and killed at the CTA's Howard station on Tuesday afternoon, Chicago police say.
According to authorities, the man was standing on the Red Line platform at approximately 12:30 p.m. when a man walked up to him and opened fire, striking him multiple times.
The man was taken to St. Francis Hospital, where he was later pronounced dead.
Police say the shooter fled the scene on foot, but remains at large.
After the shooting, service was suspended on three different CTA train lines. Yellow Line trains were shut down for most of the afternoon, but service has resumed with delays, according to the agency.
Red Line trains are still running with delays as well, and Purple Line trains are also running with delays after the investigation. Purple Line riders are encouraged to use the Red Line as an alternative route.