A police guard has been placed at the scene of a small house fire in Delacombe overnight.
CFA fire investigators and detectives from the Ballarat Criminal Investigation Unit are due at the house later this morning to help determine the cause of the blaze.
The house, in Leawarra Crescent, shows no obvious signs of being burnt from the outside.
Four fire crews from Ballarat City and Sebastopol were called to the address at 4.32am.
The brick house was unoccupied at the time.
While a crime scene has been created at the address, it is not yet clear if the fire was deliberately lit.