Three more Mongols MC gang members have been arrested after another bout of police search warrants.
In total, 17 gang members now face 263 charges following warrants executed on Tuesday and Wednesday.
"Eighteen search warrants have now been conducted over the past two days as part of the final phase of Operation Silk," Det Supt Greg Williams said.
"A further three loaded AK47 and two military-style semi-automatic firearms were located [on Wednesday].
"This brings the total number of firearms seized over the past two days to 13."
Police said at least six recent shootings in the area have been linked to the motorcycle gang.
It was revealed last month the police had used New Zealand's COVID-19 lockdown to target several gangs, including the Mongols.
Williams said one of the firearms seized on Tuesday was confirmed to be an MP38 submachine gun.
The three people arrested on Wednesday face charges of participating in an organised crime group, unlawful possession of firearms, and conspiracy to deal methamphetamine, Williams said, adding he anticipates further arrests and charges.
Information about senior Mongols member Brodie Collins-Haskins, of Auckland, is also being sought. Williams said he's facing several charges.
"For any sightings or information in relation to his whereabouts please contact police on 111 or anonymously via Crimestoppers on 0800 555 111."
