Police are investigating the circumstances surrounding a suspicious house fire in Boronia overnight.
Emergency services were called to the Orchid Avenue property following reports of the fire about 11.15pm.
The home, which is currently vacant, was significantly damaged.
Investigators have been told a man was seen running from the vicinity of the fire shortly after an explosion was heard coming from the property.
A crime scene has been set up and a crime scene guard placed on the property until fire investigators and detectives revisit the scene today.
Anyone who may have witnessed the incident or with information is urged to call Crime Stoppers on 1800 333 000 or log onto .
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