Authorities believe medical issue is the cause of fatal ATV crash near Stapleton

STAPLETON, Neb. -- A North Platte man is dead following an ATV accident.

The crash happened Wednesday morning about eight miles southwest of Stapleton. Authorities say it appears 60-year-old Michael Hiatt lost control of his ATV and rolled it while rounding up loose cattle.

Investigators say it appears Hiatt suffered a medical issue prior to the crash.

He was pronounced dead at the scene.