Police are investigating a suspicious house fire on Heatherton Road in Dandenong.
A passer-by saw smoke coming from the address about 10pm on Tuesday 19 July and called triple-zero.
The CFA attended and extinguished the fire, containing it to a small area of the house.
Greater Dandenong CIU Detective Senior Constable Nic Hayes said the man who lived at the address was not home at the time.
He said CFA and police arson experts had deemed the fire suspicious.
He urged anyone who saw suspicious activity near Stud and Heatherton roads between 6pm and 10pm to call Crime Stoppers on 1800 333 000.
