A train carrying crude oil derailed and burst into a fireball in rural West Virginia on Monday, forcing residents to evacuate and sending oil leaking into a river.

At least one tanker car, and possibly more, fell into the Kanawha River, some 30 miles from the state capital of Charleston. That prompted concerns about potential contamination of water-treatment facilities that serve two small downstream communities, according to Lawrence Messina, a spokesman for the West Virginia Department of Military Affairs and Public Safety.

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