No injuries have been reported in a train derailment in eastern Nebraska’s Dodge County.

Union Pacific Railroad spokesman Mark Davis says 21 cars went off the tracks around 4:45 a.m. Tuesday just west of North Bend. They were part of a train headed from Wisconsin to Wyoming. The train consisted of three locomotives and 138 empty coal cars.

The derailment is blocking both tracks in the area. Davis says he had no estimate for when the tracks would be cleared.

He says the derailment cause is being investigated, but heavy winds are suspected.