An 85-year-old man and a dog died in a house fire in western Minnesota, officials said Monday.

The blaze broke out about 9:30 p.m. Sunday at a home on NE. County Road 102 northwest of Miltona, the Douglas County Sheriff's Office said.

DeMartelaere's son, Charles, was in an outbuilding, saw the flames and tried to enter the fully engulfed house, "but he was unable to do so because of the smoke, heat and flames," a Sheriff's Office statement read.

First responders found the body of Gene DeMartelaere, 85, and a dog on the main floor, the Sheriff's Office said.

Charles DeMartelaere, 52, was taken by ambulance to Alomere Hospital in Alexandria for treatment of smoke inhalation.

Officials have not indicated how the fire started.