Police are dealing with high levels of supply and demand as they continue their war on drugs

Officers seized more than 60 kilograms of methamphetamine in Rotorua on Wednesday, which has a street value of 36 million dollars.

Last week, more than 200 kilograms of the drug was discovered in a major operation in Auckland.

Drug detection agency manager Rod Dale says New Zealand is a lucrative market and is targeted by international cartels.

Dale says ESR wastewater tests reveal New Zealanders use 16 kilograms of meth per week.