Police in the Bay of Plenty have uncovered chemicals which could make $2.4 million worth of 'P' and methamphetamine worth $268,000 at six clandestine laboratories.
After a six month operation, officers also seized stolen property, firearms, more than $200,000 in cash and silver and gold bars worth $100,000.
Ten people were arrested. They face a total of 90 charges relating to methamphetamine production.
Police say more charges are likely.