Union Pacific Railroad officials have reopened tracks west of Perry after seven cars hauling coal derailed late Sunday morning, said Mark Davis, a railroad spokesman.

Davis said the 135-car train was traveling from Wyoming to Kentucky. Crews are still trying to determine the cause of the incident, which occurred at 11:40 a.m. Sunday.

There are two main tracks in the area. One was closed as a precaution, but it sustained no damage. UP officials reopened it about 2:45 p.m. Sunday.

Davis said crews did have to replace about 500 feet of track on the line where the derailment occurred. It reopened about 1 a.m. Monday.