Emergency services were called to Mitchell Road, Ararat between Campbell Street and Grenvillea Court just after 9pm.

Three CFA vehicles were able to bring the fire under control and declare the incident safe within 30 minutes.

Ararat Fire Brigade captain Greg Taylor said the fire was being treated as potentially suspicious and CFA fire investigators had visited the scene on Thursday morning.

Ararat Police said they had no information they could release at this time.

Victoria Police has commenced its yearly hot weather anti-arson initiative, Operation Firesetter.

Police have been using an intelligence-led approach to target high risk locations and persons of interest in an effort to catch arsonists before their behaviour can have devastating consequences.

Anyone with any information about suspicious arson-related behaviour should contact Crime Stoppers on 1800 333 000 or submit a confidential report to www.crimestoppersvic.com.au