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Raw video shows the moment a Chicago commuter train jumped the tracks and barreled to the top of an escalator at O'Hare International Airport.

The accident occurred around 3 a.m. Monday and injured more than 30 passengers. The National Transportation Safety Board is investigating how the accident happened, looking into a mechanical failure and operator error.

The video, released by the Chicago Transit Authority, shows the approaching train, the moment of impact and the train climb the escalators toward the camera. Bystanders run as dust and smoke fill the area.

A Chicago Transit Authority train car rests on an escalator at the O'Hare International Airport station after it derailed on March 24. Thirty-two people were injured after an eight-car commuter train plowed across a platform and scaled an escalator at one of the nation's busiest airports.
A Chicago Transit Authority train car rests on an escalator at the O'Hare International Airport station after it derailed on March 24. Thirty-two people were injured after an eight-car commuter train plowed across a platform and scaled an escalator at one of the nation's busiest airports.  (Photo: Kenneth Webster, NBC Chicago via AP)
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A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.
A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.  (Photo: Andrew Nelles, AP)
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Chicago police work at the scene of the accident.
Chicago police work at the scene of the accident.  (Photo: Andrew Nelles, AP)
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A derailed Chicago Transit Authority train car rests on an escalator.
A derailed Chicago Transit Authority train car rests on an escalator.  (Photo: Andrew Nelles, AP)
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A police officer guards the accident scene.
A police officer guards the accident scene.  (Photo: Andrew Nelles, AP)
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Chicago Transit Authority employees work the scene of a train derailment.
Chicago Transit Authority employees work the scene of a train derailment.  (Photo: Andrew Nelles, AP)
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A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.
A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.  (Photo: Andrew Nelles, AP)
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Like this topic? You may also like these photo galleries:

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    • A Chicago Transit Authority train car rests on an escalator at the O'Hare International Airport station after it derailed on March 24. Thirty-two people were injured after an eight-car commuter train plowed across a platform and scaled an escalator at one of the nation's busiest airports.
    • A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.
    • Chicago police work at the scene of the accident.
    • A derailed Chicago Transit Authority train car rests on an escalator.
    • A police officer guards the accident scene.
    • Chicago Transit Authority employees work the scene of a train derailment.
    • A derailed Chicago Transit Authority train car rests on an escalator at the O'Hare airport station.
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