Detectives from Taskforce Lunar are investigating two arson attacks at tobacco stores in the state's west over the weekend in Ararat and Cohuna.
The first incident occurred just after 1am on Saturday, 6 July when emergency services were called after patrolling police noticed smoke coming from inside a tobacco store on Ingor Street in Ararat.
There was nobody inside the store at the time, but the premises sustained significant damage.
Emergency services were called to the second incident just before 3am on Sunday, July. It is understood a car was driven into a King George Street business in Cohuna before it was set alight.
Nobody was inside the premises at the time but the building was completely destroyed and neighbouring businesses sustained minor damage during the incident.
The investigations into both incidents remain ongoing.
Anyone who witnessed either incident, with dash cam/CCTV footage or information is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au