Four crews remain at the scene of the . The fire is yet to be extinguished fully. It is expected the operation will continue for some time in the house where the fire started.

A crime scene has been established by officers from Liverpool Police Area Command.

NSW Police said cause of the fire was still to be determined, but it is not being treated as suspicious.

Two ambulance units were on standby, but all occupants were accounted for and there were no patients, an ambulance spokesman said.

The garage fire, which was unrelated to the house fires, has been contained.