DULUTH, Minn. (AP) — Authorities say the deaths of twin brothers found in a burned home outside Duluth appear to be accidental.

The bodies of Terry and Jerry Rousse were discovered Saturday in their home in Canosia Township after someone conducting a welfare check on the 68-year-old brothers called police.

The St. Louis County Sheriff’s Office said Monday that Terry Rousse died of smoke inhalation and thermal injury from the fire, and Jerry Rousse died of smoke inhalation and carbon monoxide toxicity.

A fire marshal investigation was pending, but the sheriff’s office said the fire was believed to be accidental.