DULUTH, Minn. - Authorities are releasing more information about the elderly Duluth couple found dead on Saturday.

Duluth police say Ron Tarnowski, 82, and Mary Tarnowski, 78, were found on Saturday shortly before 4 p.m., after they were missing for eight days.

A U.S. Border Patrol Helicopter found their vehicle in a rural area about 150 yards off of Highway 2 in the Brookston, Minnesota area. St. Louis County Sheriff's Office Sgt. Wade Rasch says it appears the couple drove off the road onto a swampy trail that was likely only used as a snowmobile trail during the winter.

Rasch said Mary Tarnowski was found in the car, which was stuck on the trail, and Ron Tarnowski was found closer to the highway. Rasch said it appears Ron went to get help after the car became stuck.

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The autopsy results are pending, but Rasch said it's likely the couple died of exposure.

A post on the Find Ron and Mary Tarnowski Facebook page stated, "It is with great sadness that we must report that Ron and Mary Tarnowski have been found deceased in a remote area about a mile from their hunting camp."

The couple had been last seen on surveillance video at a Country Corner store near Brookston, Minnesota, around 1 p.m. on Saturday, July 29.

Ron had early-stage dementia, and Mary had right-sided paralysis, making it difficult to speak.