Those arrested face a number of charges.
Police seized three firearms and 49 rounds of ammunition, as well as a quantity of methamphetamine, cannabis, and cash, and four vehicles have been impounded.
Southland Area Commander Inspector Mike Bowman said today the past few months had been "very unsettling" for residents of Invercargill and the wider Southland region.
“We have had three tragic homicides, as well as other serious crime, and people have been understandably concerned, Insp Bowman said.
“As we head into the holiday season, I hope the results of this week’s operation provide our residents with the assurance that we remain absolutely focused on combatting the criminal elements that seek to profit from harming our communities.
“At this time of year, we also typically see an increase in volume crime such as burglaries and thefts from cars, and we’ll have a real focus on prevention activities in that space over the holiday period.”
Road safety would be an important focus for police over the Christmas/New Year period and officers would be out in force, Insp Bowman said.
“We want everybody to get to and from their holiday destinations safely and see in 2020 with their loved ones."
