Police have seized more than 2000 cannabis plants, drugs utensils, and illegal firearms in a series of search warrants in the South Island.
About 30 staff took part in an operation, which started two weeks ago, Inspector Dan Mattison said.
In the Nelson and Marlborough areas, about 900 cannabis plants were recovered.
Police also seized two illegal firearms, one of which was loaded, $1700 in cash, and meth and cannabis utensils.
Police executed 12 search warrants, six at residential addresses and a further six at rural locations.