The plane, registered to Bemidji Aviation, crashed under "unknown circumstances" near a road and a retaining wall, the FAA said. Early indications are the pilot experienced a mechanical failure prior to the crash, Solee said. The FAA and the National Transportation Safety Board are investigating.

Early investigation in Clearwater County, Minnesota shows that the pilot experienced mechanical failure and poor weather. The condition of the pilot is not known as of Monday morning.

A plane crash in northern Minnesota early Monday has sent its pilot to the hospital following a potential mechanical failure.