A male and a female, both 29, have been jointly charged with possession of methamphetamine and unlawful possession of a firearm.
The male is scheduled to appear in the Whangarei District Court tomorrowand the female will appear next Wednesday.
It comes just two weeks after police raids in Kaiwaka uncovered a methamphetamine laboratory at a property where five children all younger than 12 were living.
One of the children was under 1 and police involved Oranga Tamariki in that case also, saying the children's safety and welfare was paramount.
Two properties in Kaiwaka were searched by police and Northland Armed Offenders Squad members at about 6am on April 12 and an Auckland-based clandestine laboratory team was called to help safely remove the drug lab in a shed about 100m from the house.
Police said other drug-making items were found in a car at the property.
A 31-year-old female faces two charges of supplying methamphetamine and 12 of offering to supply methamphetamine and one of supplying cannabis.
A 33-year-old male has been charged with manufacturing and possessing methamphetamine and possessing cannabis.
Anyone with information about illegal drug activity is urged to contact their local police station or Crimestoppers anonymously on 0800 555 111.