According to the Associated Press, a Burlington Northern Santa Fe train with 121 loaded cars and three locomotives lost 18 cars in a derailment near Brainerd, North Dakota.
The train was headed for Superior, Wisconsin, and the spill near the Brainerd Lakes Regional Airport blocked a main track.
A BNSF spokesperson told the AP crews were working on Monday to clear the tracks and minimize the railroad’s delays. She added the cause of the incident had not yet been determined.
The news service also reported a Sunday morning derailment in western Nebraska, though details are still being compiled.
The coal train lost “dozens” of cars near Lake McConaughy, between Sand Creek and Martin Bay.
Investigators are looking into the cause of the spill, which occurred at 7.20am local time.
Finally, the AP said nearly 30 Indian Railroad train cars left the tracks Sunday afternoon near Bloomington, Indiana.
It is the second derailment in the area in just five days. Sixteen cars of a CSX freight train left the tracks last Wednesday just southeast of Indianapolis.
Indiana Monroe County chief deputy Mike Pershing told the news service the train’s engineer said heat may have played a role in the most recent incident, as extreme heat made the tracks expand and contract.