MELROSE — Authorities are investigating the death of a 65-year-old man whose body was found under a tractor in central Minnesota.

A 911 caller reported the man was found trapped and unresponsive under the tractor northeast of Melrose on Wednesday. Deputies arrived and determined that Donald Hinnenkamp of Melrose was dead.

The Stearns County sheriff’s office says Hinnenkamp was found partially entangled in a hay merger. Authorities say Hinnenkamp may have had a medical episode and was able to put the tractor in neutral.

The Ramsey County medical examiner’s office will conduct an autopsy.