(KNZA)--A woman died Friday afternoon in a St. Joseph, Missouri apartment fire.

Firefighters were called to the Brittany Village Apartment Complex in the 1700 block of North 36th Street around 4:00 and discovered a fire in one of the apartments.

Police say the body of 24-year-old Amber Nagle was discovered inside a bedroom in her unit after the fire was extinguished.

Police say an autopsy will be conducted to determined an official cause of death.

The other occupants of the apartment complex were safely evacuated and later allowed to return to the building.

KQ-2 TV reports the fire department believes a malfunctioning furnace may have started the fire, but an official cause remains under investigation.