Vic vandals damage 30 cars with iron bar

A man leaning out of a car window has used an iron bar to smash more than 30 cars across two Melbourne suburbs.

Police believe two men - a driver and his passenger - were involved in the three-hour rampage in South Morang and Epping early on January 13.

Investigators on Tuesday released CCTV footage of the car that may have been used in the attacks.