Staff at a bar in downtown Auckland were forced to step in after a punter was seen with a gun late last night.
Authorities were called to a premises on Sale St after reports of someone being in possession of a firearm shortly before midnight.
A police spokeswoman said: "The firearm was taken off the person by staff and they were arrested by police for unlawful possession."
No shots were fired and no one was injured.
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Asked whether the person involved had threatened anyone in the vicinity, the spokeswoman said: "No indication they were being threatening - just that they were noticed by others to have it in their possession."
The incident comes almost a week after a shooting incident at another downtown Auckland bar - Dr Rudi's Rooftop Brewing Co - at the Viaduct.
Police were called there about 2.45am in the early hours of last Sunday after shots were fired into the foyer ceiling.
Police said a "brief altercation" broke out among a group of people outside the bar before someone pulled out a gun. They had earlier been removed from Dr Rudi's.
No one was injured in the incident, but other punters who were there took cover - some reportedly hiding under tables - after the shots were fired.
A 25-year-old man has been arrested and will face a number of firearms-related charges as a result.