Photo: RNZ / Angus Dreaver
Another 10 gang members have been charged as part of Operation Kōtare.
In a statement, police said the gang members were facing serious charges including domestic abuse, unlawful possession of firearms, possession of Class A drugs, receiving stolen property and repetitive breaches of bail.
Operation Kōtare was focussed on disrupting, suppressing, and preventing organised crime and gang harm, police said.
The gang members were arrested following search warrants in Gisborne, Hastings and Wairoa this week.
Police said officers seized illicit drugs, illegal firearms and stolen property, including a boat, during the searches.
Inspector Darren Paki said police would continue to hold gang members to account for "their harmful actions in our communities".
"We are steadfast in our approach to reducing gang harm through strong enforcement tactics and prevention programmes with our partners.
"The prevention team is following up with support work and are receiving great feedback about our enforcement results."
Paki said police would follow up after search warrants to see where re-offending can be prevented.