Police have arrested 25 members of a gang responsible for selling $2 million worth of metampetamine in the lower North Island.
About 150 officers executed search warrants in Upper Hutt, Wellington, Masterton, Martinborough and Carterton on Wednesday following a 12-month investigation named Operation Hunter.
The operation follows raids in April this year in the same areas, when eight people were arrested and 35 charges laid.
Detective Inspector Darrin Thomson says the people arrested on Wednesday all have connections to the New Zealand Nomads gang.
He says the 180 charges laid against them include possession of methamphetamine, cannabis oil and prescription medicines.
Police have also recovered about $100,000 in cash, 200 LSD tablets with a street value of about $8000 and six vehicles worth a total of $150,000.
Police Minister Judith Collins says the operation has been going on for more than a year and is another step towards taking out the big players involved in the drug trade.