Boroondara Crime Investigation Unit detectives are appealing for public information as they continue to investigate a significant fire in Hawthorn earlier this year.
A block of units was completely destroyed by the large fire on Thursday, 10 April.
Emergency services were called to the blaze about 4.20am, and the units were unoccupied at the time.
An arson chemist determined the fire was suspicious and detectives have carried out extensive investigations into the circumstances.
No arrests have been made at this stage.
Members of the public reported hearing explosion sounds once the building was up in flames. Police want anyone who was in the area prior to the incident to come forward with any information.
Anyone who witnessed the incident, has CCTV/dashcam footage or information is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au
