Police are investigating after a gym was set alight in Taylors Lakes this morning.
Emergency services were called following reports two masked offenders broke into the Sunshine Avenue business and began pouring petrol on the ground shortly before 3.30am.
They warned two people who were working out at the time to leave and then set it alight.
The male offenders fled the scene in a vehicle waiting outside.
A cleaner upstairs at the time was also able to escape without injury.
The building sustained significant damage and investigators are treating the incident as a targeted attack.
Anyone who witnessed any suspicious behaviour in the area, with vision or information is urged to contact Crime Stoppers on 1800 333 000 or anonymously at www.crimestoppersvic.com.au