A train transporting coal from the Powder River Basin derailed near Terry, Mont., on Monday night, according to a railroad spokesman.
No one was injured in the incident.
Matt Jones, a spokesman for Burlington Northern Santa Fe, said 29 of 115 cars in the train went off the tracks. Of those 29, the majority overturned, he said.
The cause of the derailment is still under investigation. Details on the amount of coal lost were not immediately available.
The train was shipping coal from the Cordero Rojo mine, 25 miles south of Gillette, to Minnesota. The mine is owned and operated by Cloud Peak Energy.
A company spokesman said Cloud Peak was assessing the situation and is ready to assist should it be asked by BNSF.
Crews are currently cleaning the track, which is scheduled to reopen about 8 p.m. Tuesday, Jones said.
The accident left coal cars in a series of twisted balls, said Prairie County Undersheriff Jason Smith. Coal was strewn about the ground, he said.
No property was damaged in the accident, which occurred about 9 p.m. Monday approximately a mile outside of Terry, a town of 600 people northeast of Billings.
"It’s very rare," Smith said. "Train derailments don’t happen that often."