Queenstown Lakes police have seized drugs, money and firearms as part of an operation targeting drug suppliers this week.
Detective Nicola Clark said search warrants were issued after police identified an increase in drug use in the area.
Police searches on Monday and Tuesday seized cash, brown crystal substances, cannabis and capsules, as well as 11 firearms.
A firearms licence holder also had their licence suspended.
Clark said no one had been charged yet.
She added that cash, cocaine, MDMA, ketamine and LSD had been seized in earlier raids over the last several weeks.