Police are raiding at least seven properties around Geelong and Werribee linked to the Geelong chapter of the Bandidos outlaw motorcycle gang.
The Wednesday morning raids by Task Force Echo detectives are part of an extensive investigation into alleged drug trafficking by people connected to the gang.
Police said four people had been arrested, while guns, drugs, cash, weapons and stolen vehicles were seized.
Warrants were executed at properties at O’Dwyer Court in Lovely Banks, Wheeler Place in Geelong, She Oaks Road in She Oaks, Bluebill Court and Sheeran Crescent in Lara, Fuchsia Court in Newcomb and Riverside Avenue in Werribee.
Police said searches of the properties were continuing.
