Detectives are investigating a fire at a tobacconist in a shopping centre in Craigieburn on December 10.
Emergency services were called to the blaze at the Craigieburn Road centre about 3.30 am.
It is alleged three offenders exited a black Holden Commodore which was parked directly outside the store, before throwing an accelerant into the store and setting it alight.
The shop sustained significant damage during the fire.
Investigators cordoned off the area and set up a crime scene.
A Holden Commodore was later located burnt out in Companion Place in Epping shortly before 7 am and police are in the process of determining if it is the same vehicle used in the tobacco shop arson.
Anyone who witnessed the incident, with dash cam/CCTV footage or information can contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au