Officials say crews are trying to determine if an oil train spilled any crude when it derailed in rural northeastern Montana, prompting the evacuation of some homes.
BNSF spokesman Michael Trevino says the train with 106 loaded crude oil cars derailed near Culbertson near the North Dakota border just after 6 p.m. Thursday.
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No injuries or fires were reported, but of the 22 cars that derailed, only two remained upright.
Police and fire crews are at the site of the derailment, which has forced the closure of federal Highway 2, the region's main artery.
Roosevelt County Sheriff Jason Frederick tells The Billings Gazette that authorities have evacuated some homes within a mile of the derailment.
He says a BNSF hazardous materials team was flying in from Texas,