The Associated Press reports:

WATERTOWN, S.D. - Investigators suspected lightning as one possible cause of a fire that killed thousands of turkeys near Watertown Friday morning.

Fire crews were called to Oak Valley Farms around 6 a.m. and found the processing plant filled with flames. The plant is 3 miles southwest of Watertown.

The fire chief said 13,000 turkeys were killed.

Investigators were looking for the cause, but suspected either a lightning strike or faulty wiring.