"Police have seized a number of firearms and one person has been arrested and charged with Unlawful possession of firearms," Small said.
"Police are following a number of positive lines of inquiry in relation to others involved."
One person was in hospital with moderate injuries, he said.
"Police believe the groups involved are known to each other and do not believe there is a threat to the general public.
"Police would like to hear from anyone who may have witnessed this incident. If you have any information that could help our investigation, please contact Waitemata West Police on (09) 839 0697."
Alternatively, information can also be provided anonymously to Crimestoppers on 0800 555 111.