A large fire in Castlecliff has left only the skeleton of a home standing, with Whanganui fire crews fighting the blaze for several hours.
Specialist fire investigator Gary Hills said the call-out to the address on Cornfoot St came at 3.30am on Monday.
Due to the speed of the fire, one occupant had to get out through a window in the property, Hills said.
The fire was well-involved by the time fire crews arrived but no one at the home was injured.
An investigation into the cause of the fire found it began in the lounge area of the house and was accidental.