POLICE are investigating the torching of four cars outside a Balga house early this morning.

Firefighters were called to the Ticehurst Way property at 12.40am after reports that vehicles were alight.

There was no fire damage to the house, but several windows were broken.

Forensic officers will return to the scene today as part of the investigation.

FESA estimated the damage bill to be about at $10,000.