DETROIT LAKES, Minn. (AP) - Authorities in northwestern Minnesota are trying to determine if a North Dakota man drowned in a lake or died of a medical condition.

The Becker County sheriff's office says 56-year-old Ronald Price of Fargo was found unresponsive in Lake Maud late Saturday night.

Efforts to revive Price failed, and he was pronounced dead at a Detroit Lakes hospital.

His wife says Price had been relaxing in a floating chair in shallow water before he was found.

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

Lake Maud is southwest of Detroit Lakes.