Burlington Northern Santa Fe officials have reported that a freight train with three locomotives and one car derailed around 7 p.m. on Sunday, March 1, in Perrin, about 97 miles west of Winslow, near Williams . The derailment occurred when the train struck a boulder on the tracks. No injuries were reported and no hazardous materials spilled. The incident caused the tracks in both directions to be shut down until the afternoon of the following day, delaying shipments 12 to 24 hours. Information on the size of the boulder or how it came to be on the tracks was not available.