The Royal Newfoundland Constabulary have determined a house fire in Corner Brook on Saturday was accidental in nature.
The blaze at a home on West Ave. started shortly before 5 p.m.
Police said three residents, one woman and two men, were able to escape the burning home and were sent to Western Memorial Regional Hospital for non-life threatening injuries.
A firefighter, 26, was also taken to hospital after suffering from what was believed to be heat exhaustion and smoke inhalation. He was later released from hospital.
The RNC said the home was damaged extensively in the fire.
It took crews almost five hours to extinguish the fire in the older, two-storey home.
Police said they believe the fire started in one of the upstairs bedrooms.
The Canadian Red Cross is providing assistance to the three displaced residents.