RUTHTON — Authorities are investigating a plane crash in southwestern Minnesota that left the pilot dead.

The Pipestone County Sheriff’s Office said the crop-dusting plane crashed Friday morning near Ruthton.

Authorities said the pilot, 68-year-old James Arnt of Worthington, clipped a guy wire to a tower and crashed into a field. He died at the scene.

The Federal Aviation Administration and the National Transportation Safety Board are helping in the investigation.