Thompson said that yesterday's searches, which netted a large amount of those items, resulted in the arrest of four people.
A 52-year-old Palmerston North man was arrested after stopping his vehicle for police just south of Paekakariki. Two women, aged 36- and 21-years-old, and a 21-year-old man were arrested at the addresses.
In the time leading up to yesterday's operations, Thompson said nine others were arrested and all faced a range of serious drug charges.
"We are thrilled with the outcome of the investigation and are confident the group involved in the supply of methamphetamine has been dismantled," he said.
"It again shows that people involved in this drug are driven by greed and will continually look to profit from it. This is at the expense of those who are addicted to its use.
"The impact on our community with methamphetamine supply and its subsequent use is huge. Taking out any supply network is satisfying in our attempts to lessen that impact."
The 52-year-old man appeared in court today charged with possession of methamphetamine for supply; possession of cannabis for supply; and the unlawful possession of a firearm.
The 36-year-old woman also appeared in court and was charged with possession of methamphetamine for supply.
The remaining accused were yet to appear.
*Anyone with information about drug harm in their communities can contact Crimestoppers anonymously on 0800 555 111.