Victoria Police is investigating a suspicious housefire in Sunbury that ignited last night.
Police responded to reports of a vacant house alight on Old Vineyard Road about 11.50pm on Sunday, March 16.
A man was arrested near the scene and interviewed.
He was released pending further investigation, and there were no reported injuries.
The investigation remains ongoing.
Anyone who has CCTV, dashcam footage or any other information that could assist police with their enquiries is urged to contact Crime Stoppers on 1800 333 000 or crimestoppersvic.com.au