(CHICAGO) A man is in critical condition after he was struck by a CTA train during Tuesday’s morning commute downtown, suspending service on the Blue Line.

The man, thought to be in his 40s, was stuck by a train in a tunnel area near the Clark/Lake station at 7:50 a.m., according to Chicago Police.

He was taken in critical condition to Northwestern Memorial Hospital. Police said the incident was an attempted suicide.

Power was shut off in both directions and service is suspended between the Damen and UIC-Halsted stations, CTA spokesman Steve Mayberry said. Shuttle buses are running in the affected area.

Trains are running between Damen and O’Hare, and between UIC-Halsted and Forest Park, according to the CTA.