Four people have been arrested on drug charges and a number of firearms seized after police executed a series of search warrants in Nelson on Wednesday.
It comes after a five-week investigation called "Operation Highland" focused on the sale and distribution of methamphetamine in the Nelson region.
As well as the firearms, drugs and stolen property were also seized.
Those arrested will appear in the Nelson District Court on Wednesday.
The arrests come after 35 people were arrested on Tuesday and more than 900 charges laid as part of a transnational police operation targeting organised crime in New Zealand.
