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LONGVILLE, Minn. (AP) The Cass County sheriff says a husband and wife found dead in their cabin near Longville over the weekend died from carbon monoxide poisoning.

Relatives found the bodies of 58-year-old Lee Schwarze and his 55-year-old wife, Nancy, on Saturday afternoon. The couple was from Hutchinson.

Their son, 22-year-old Michael Schwarze, also of Hutchinson, was found in the cabin unconscious and was flown to Hennepin County Medical Center in Minneapolis. Schwarze was in critical condition Tuesday.

Authorities suspect a poorly ventilated gas heater may be to blame.

Information from: The Brainerd Daily Dispatch, http://www.brainerddispatch.com (Copyright 2009 by The Associated Press. All Rights Reserved.) APNP 10-20-09 1906CDT | save this article / add to your favorites list