Bunbury police paid the Coffin Cheaters Motorcycle Club in Zoe Street an early morning visit on Tuesday.
Officers from the Gang Crime Squad in Perth joined members of the South West drug team to execute a warrant about 8am.
About 9.30am forensic police arrived at the clubhouse to join the search team.
Detective Senior Sergeant Al McNevin said three premises were searched, including one residential home, with prohibited weapons and a quantity of illicit drugs seized.
The raids came courtesy of tip-offs from the public.
Detective Senior Sergeant McNevin said one person had been arrested and charged with possessing a prohibited drug with intent to sell or supply.
For more coverage of the search warrants visit bunburymail.com.au.
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