Police arrested five people in Auckland on Wednesday after an early-morning operation investigating the sale and distribution of synthetic cannabis.
Avondale Police area commander, Inspector Jacqui Whittaker said three search warrants were carried out at one residential address in Pt Chevalier and two commercial properties in New Lynn.
The searches of the three properties that began just before 6am were still underway on Wednesday afternoon.
The armed offenders squad was used as a precautionary measure at all locations in the initial stages of the operation but have now left.
Police seized synthetic cannabis, methamphetamine, drug utensils, cash and other chemicals which are yet to be established from the properties.
"This morning's operation carries on from information police obtained following an operation that was carried out in April earlier this year in Avondale," said Inspector Whittaker. "It is the result of a long-running investigation into the sale and distribution of synthetic cannabis."
The five people arrested have been charged with a range of offences, including possession of synthetic cannabis for supply, possession of utensils and possession of methamphetamine and pre-cursor substances.
Police are not ruling out further charges.