Police have seized more than 10kg of the so-called "synthetic cannabis", following nationwide raids.
Waitemata police, with assistance from Palmerston North and Christchurch police, executed search warrants at nine addresses on Thursday morning.
This investigation began in June after NZ Customs found more than a kilogram of AMB-Fubinaca and AB-Pinaca - the psychoactive substances used in the manufacture of synthetic drugs.
Last week Waitemata police seized 2kg of AMB-Fubinaca and 11kg of synthetic drugs.
The 3kg of AMB-Fubinaca and AB-Pinaca seized during this operation would be sufficient to manufacture 150kg of synthetic cannabis - worth a street value of $1.5 million.
A 48-year-old male from Glendene will be appearing in the Waitakere District Court on charges relating to possession of a firearm and ammunition as well as possession of a Class A drug.
"We will do everything we can to hold those responsible for manufacturing psychoactive substances to account," says Acting Detective Inspector Roger Small.
"This is only the tipping point and police are continuing to conduct enquiries around psychoactive substances. We are confident that further arrests will come as we continue to investigate this serious issue."
Newshub.
