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AURORA, Colo. — A passenger was seriously injured when they were ejected from an RTD train after it derailed on Monday morning, the Aurora Police Department said.

The R-Line train derailed near South Sable Boulevard and Exposition Avenue during Monday morning’s snowstorm.

Other passengers also reported minor injuries and were transported to the hospital.

The extent of the injuries is not known.

The incident remains under investigation, which may include charges against the driver. According to Aurora police, “speed and weather conditions, due to the heavy snowfall, are factors being considered.”

Crews are on scene working to put the train back on the tracks and resume service.