Sources claim there was a small explosion at O'hare International Airport in Chicago on Tuesday morning that injured a baggage handler.

The explosion was believed to be caused by a battery-shipping container, according to Chicago Fire Department Commander Will Knight.

Knight said, in a press release, the explosion could have been "an accidental discharge."

Criminal activity is not suspected. However, the incident triggered a response from Hazmat to a baggage claim area of the Chicago airport. The area is not open to public.

The bag was checked in the C Concourse, according to a representative for the Transportation Security Administration.

The United Airlines employee suffered minor injuries and was hospitalized.

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Fire department and rescue personnel were dispatched to the explosion site. Chicago Police Bomb and Arson were also on the scene.