Five men and three women have been arrested after a three-month operation targeting the manufacture and supply of methamphetamine in Rotorua.
Police have also seized several vehicles, $50,000 cash, several firearms, 500 grams of methamphetamine, and methamphetamine manufacturing equipment.
Those arrested are aged between 19 and 56 and police said they were linked to the Mongrel Mob.
They have been charged with a variety of offences, ranging from possession of firearms, manufacturing methamphetamine, and supplying methamphetamine and possession of cannabis for supply.
Detective Inspector Lindsay Pilbrow said officers would continue to work towards suppressing unlawful gang behaviour.
"We have a commitment to disrupting and dismantling networks identified and will continue to target those who illegally accumulate assets and wealth through the sale and supply of illegal drugs and firearms.
"Our message to those involved is clear - we have zero tolerance for any violence, gang and drug activities."
The operation was run by the Rotorua police organised crime squad, supported by other Bay of Plenty staff.