Blue Line trains resumed service early Thursday morning hours after a derailment near O'Hare Airport injured a woman and forced dozens of passengers to evacuate.
The derailment happened around 7 p.m. Wednesday suspending service on the popular line between O'Hare Airport and Rosemont.
A 39-year-old woman was taken to Resurrection Hospital with a back injury, authorities said. Seventy-three passengers were evacuated from the train, the Chicago Fire Department said.
Crews were working to restore service in the area. The CTA warned commuters to allow for extra travel time or seek alternative routes such as nearby busses or other rail lines.
By 2 a.m., normal service resumed on the line, but the transit agency still warned of residual delays for commuters.