POLICE are investigating a suspicious fire that has destroyed a gym and damaged two other businesses in Pacific Pines.
The blaze ripped through the fitness club around 4.20am on Saturday before spreading through neighbouring shopfronts.
Residents living in a townhouse complex behind the building were evacuated while firefighters battled the inferno.
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The gym was destroyed in the fire while a real estate agency and a health care business were damaged, police said.
Although it was not immediately clear what sparked the blaze, police on Saturday morning said they were treating it as suspicious.
The area has been declared a crime scene and remains under police guard.
Detectives are investigating the circumstances surrounding the incident and are appealing for anyone with any information to come forward.
You can also report information about crime anonymously to Crime Stoppers by calling 1800 333 000 or via crimestoppersqld.com.au 24 hours per day. Crime Stoppers is a registered charity and community volunteer organisation.