“The public will appreciate we can’t share the details of the work ongoing, however we have a dedicated investigative team that is working to hold those involved to account for what happened that day.”
A 43-year-old man appeared in the Auckland District Court this weekend to face charges for unlawfully possessing the weapon.
Bunce said police are still seeking information from the public as inquiries continue.
Members of the public can update the police online now or call 105 using the reference number 260116/9278.
Information can also be provided anonymously via Crime Stoppers on 0800 555 111.