Senior police figures fear a volley of up to a dozen shots fired in the early hours of yesterday morning could be a "get out'' warning as the Finks move to reclaim their territory.

AN underworld bikie war is on the brink of erupting at Helensvale after shots were fired into a Hells Angels gym that sits in Finks heartland.

Senior police figures fear a volley of up to a dozen shots fired in the early hours of yesterday morning could be a "get out'' warning as the Finks move to reclaim their territory.

The Finks' run of the northern corridor of the Gold Coast has been under threat from the rival gang, which is said to be pushing to expand its territory from its Browns Plains base.

Police say senior Sydney figures from the Hells Angels are behind the rapid expansion.

Task Force Hydra, set up to fight outlaw motorcycle gangs in Queensland, and the Serious Violent Crime Squad will head an investigation into the attack on the Helensvale First Choice Fitness Centre.

The gym is believed to be owned by a patched member of the Hells Angels who arrived at the premises about 5am to find it riddled with bullets.

The offenders have not been caught.

Company searches reveal the gym is owned by Peter Sidirourgos who was arrested over drug charges in NSW in 2000 alongside senior members of the Bandidos motorcycle gang.