Swan River RCMP say they are investigating after making a grim discovery.

Early Sunday morning fire crews were called to Renewer, a hamlet located approximately 30 kilometres west of Swan River. 

Responding to the fire at 12:40 a.m., crews successfully extinguished the flames. Crews believe the fire was accidental.

Once under control, crews entered the building, finding human remains inside.

The Office of the Fire Commissioner and the Office of the Chief Medical Examiner, along with Swan River RCMP are investigating. They have not yet identified the remains.