Authorities inspect damage to Chicago Transit Authority trains after crash in Forest Park, Illinois. (Photo courtesy: AP)
UPDATE (AP)---The morning commute was mainly running smoothly a day after an empty, unmanned commuter train slammed into another at a suburban Chicago station, injuring dozens of passengers.
The Chicago Transit Authority train connecting Chicago's western suburbs with downtown and O'Hare International Airport was operating on a single-track near the Harlem stop on Tuesday. The train was bypassing the station where Monday's collision occurred.
Video footage shows that no one was driving the four-car train when it rumbled the wrong way toward a parked train about 10 miles west of Chicago. Investigators are trying to determine how it somehow started moving along the tracks.
The trains are driven by conductors.
As many as four dozen people on the parked train were treated for minor injuries.
FOREST PARK, Ill. (USA TODAY)-- At least 33 people were taken to local hospitals Monday when an out-of-service Chicago Transit Authority train crashed head-on with another train stopped at a Forest Park, Ill., suburban station west of Chicago, local media report.
The Chicago Tribune quotes the CTA as saying 33 people were taken to nine hospitals, but that there were no serious injuries.
CBS 2 reports that police are investigating the possibility that somebody hijacked an out-of-service CTA train and sent it crashing into the second train.
Suspicion of foul play was raised because the out-of-service train had far fewer cars than a normal rush-hour train, was on the wrong tracks and had nobody at the controls when the crash occurred.