Fire crews have been called to two house fires in Norlane within seven hours.
FRV crews found a vacant property on Brooks Street well alight when they arrived around 11pm Monday.
They quickly brought the flames under control, but say no-one was inside the home at the time.
It is understood to be the second time fire crews have been called to the property in recent months.
Police are investigating the cause.
Meantime, crews called to Bellbird Avenue in Norlane just before 6am Tuesday.
That was brought under control within 15 minutes.
FRV says a passerby suffered smoke inhalation while trying to raise the alarm for anyone in the property.
Police have confirmed no-one was inside the property at the time and it is being treated as suspicious.
Anyone with information or footage on either fires is being urged to call Crime Stoppers on 1800 333 000.
