Two brothers from the Twin Cities metro area died Saturday morning in a trailer home fire in northern Minnesota, authorities said.

Just after 7 a.m., the Clearwater County Sheriff’s Office received a call about a structure fire southeast of the town of Clearbrook, in Leon Township. Fire departments from Clearbrook and Gonvick found the trailer home fully engulfed, according to the Sheriff’s Office.

After the fire was extinguished, the two bodies were found inside. It is believed that the brothers were using the trailer as a hunting cabin. Their names have not been released.

Although the cause of the fire is not yet known, foul play is not suspected, authorities said. An investigation is underway.