Some Dunedin people took the move to alert level 1 as an excuse to get "rat-faced", which led to a busy weekend for police.
Alcohol-fuelled violence ramped up and led to a string of arrests, Senior Sergeant Craig Dinnissen said.
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An argument over a game of pool led to two men fighting outside Dunedin's Baaa Bar, at 9.15pm on Friday.
While police were attending the scene, another fight begun between two men inside the bar.