A commuter train arriving at Chicago's O'Hare International Airport jumped the tracks and climbed an escalator Monday morning.
The crash left 32 people with non-life-threatening injuries, Chicago police said.
The Chicago Transit Authority Blue Line train jumped a bumper at the end of the line and moved onto the platform and up the escalator at 2:52 a.m., Chicago Fire Department Spokesman Larry Langford told CNN affiliate WGN.
Passengers complaining of injuries were taken to four hospitals, but Dr. Douglas Propp at Lutheran General Hospital told WGN their physical pains were minor.
"As you might expect, someone who has been in a train accident is worried about the worst," Propp said. "You can imagine, people early in the morning, not expecting anything like this to happen, would be bothered by it. They came here, we reassured them. We evaluated them. Obviously, the clinical people put their minds at ease. And also, pastoral care is here to meet their needs."
It could take 24 hours before the crash site is cleared and Blue Line service is restored to the airport, WGN reported.
Investigators from the National Transportation Safety Board were expected to join the investigation Monday.
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