A further nine people had been arrested and face a range of charges, including drug dealing and firearms offences.
A police spokesperson said further arrests are likely.
Cannabis seized by police as part of Operation Tar in Hawke’s Bay.
Detective Inspector James Keene said the operation focused on both enforcement and prevention.
“Our aim is not only to disrupt organised criminal activity, but to reduce the harm it causes to whānau and communities.”
The operation involved Resilience to Organised Crime in Communities (ROCC), a police-led, multi‑agency initiative designed to disrupt the influence of organised crime.
“Operations like this demonstrate the value of a joined-up approach,” Detective Inspector Keene said.
“Ninety-six per cent of whānau engaged by the ROCC team chose to take up support.
At the same time, a team identified whānau affected by the offending and connected them with agencies able to provide support aimed at addressing the underlying issues and vulnerabilities that contribute to ongoing harm.
“We know the impact of gang-related offending often extends well beyond the immediate criminal activity,” Keene said.
“We know that methamphetamine addiction continues to harm individuals, whānau and communities.
“Alongside enforcement, we worked to identify people and whānau who had been affected and linked them with the support they need.”