A 76-year-old man is believed to be dead after a fire north of Duluth, Minnesota, on Monday, authorities said.

No medical assistance was needed, but the residence is total loss. The Red Cross was at the scene to assist the residents.

Two separate fires Monday left three people dead in Minnesota, authorities said. West of the Twin Cities in Litchfield,  two bodies were found inside what was left of a residence after a fire

The fire was reported early Wednesday morning in Houston County.

The bodies of Gregri Johnson and Barbara Johnson were found inside their residence after a fire reported in the early morning hours on Monday. The incident remains under investigation.

A portable heater is believed to be the cause of a fire in Miltona, Minnesota. Douglas County Sheriff’s Office says they responded to a call before 5 p.m. at 252 Elm Street North. They were assisted by Miltona Fire Department and Carlos Fire Department.