A brawl of around 200 people, mostly youths, has been broken up in Taitā.
It is just the latest incident in the Lower Hutt suburb after a serious assault on Monday and an hours-long armed stand-off on Tuesday.
Police said the brawl broke out on High Street, around Walter Nash Stadium, on Thursday afternoon.
Officers broke up the brawl and no charges have been filed.
Police said there would be more officers on the ground in Taitā on Friday in response to the spate of "anti-social behaviour".
A person was left in a critical condition after the Monday assault, while the stand-off saw schools locked down and streets closed.
"Our enquiries have determined these incidents were unrelated and we have dedicated teams investigating both," Hutt Valley area commander Inspector Rob Rutene said.
"This behaviour will not be tolerated by Police and staff will respond and, where appropriate, take enforcement action."
A 26 -year-old man was arrested over Monday's incident.
Police were still looking for two other people understood to be involved, Rutene said.
Meanwhile, a 25-year-old man arrested over the Tuesday stand-off appeared in Hutt Valley District Court this week, facing charges of resisting police and using a firearm against police.