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Tracks Reopen Near Casselton
CASSELTON, N.D. (AP) - BNSF Railway has reopened the two lines at Casselton that were shut down Monday when a crude oil-carrying train derailed and caught fire.

One of the lines reopened at 3 a.m. Thursday and the second about 15 minutes later. Railroad spokeswoman Amy McBeth says trains have been operating on the route since then without incident.

A westbound train carrying grain derailed first Monday afternoon, and a portion of it fell onto an adjacent track carrying the eastbound oil train. Twenty-one cars on the 106-car oil train derailed and several burned. No one was hurt.

Federal investigators have recovered a broken axle at the scene of the derailment and fire but don't know whether it caused the wreck.

National Transportation Safety Board member Robert Sumwalt says investigators will be determining whether the axle caused Monday's derailment or whether it broke during the accident.

Sumwalt says investigators have found nothing wrong with the railroad track or signals along the tracks.

He says the investigation into the cause is still in the early stages. On Tuesday night, Sumwalt said it could take at least twelve months for the NTSB to issue its final report.