Police have arrested eight men and three women and seized a haul of illicit drugs that could cause an estimated billion dollars worth of harm to the community.
Those arrested in raids by police named Operation Skipjack "phase 2" are aged between 25 and 44. Four people were previously charged in relation to "phase 1", taking the total number of arrests to 15.
Led by Wellington Police District Drugs and Organised Crime Unit, over the past two weeks more than 70 Police and Customs staff have executed 22 search warrants in Wellington, Hutt Valley, Kapiti Mana, Horowhenua and Palmerston North.
The haul included class B controlled drug Gamma Butyrolactone (GBL), and class C controlled drug Eutylone, during "phase 2" of Operation Skipjack.
During phase 1 of the operations last November, an investigation was launched into alleged offending by a local drug-dealing syndicate importing and distributing controlled drugs known by the street names of G, liquid ecstasy, and rinse.