The arrests follow a series of raids at six addresses in Papatoetoe and Manukau this week.
Police also seized over 400 cartons of allegedly illegally imported cigarettes and are liaising with NZ Customs regarding charges under the Customs and Excise Act with an investigation under way into their importation.
Gold bars were also seized during the raids. Photo / NZ Police
A man, 31, has been charged with selling the class B controlled drug opium and possession of opium for supply.
A 58-year-old man faces the same charges and additional charges relating to importing opium.