The brawl involved female students from Manurewa High School, and was organised through Facebook, a police spokeswoman said this morning.
About 40 to 50 teenagers arrived to either watch, or participate in the fight, about 1.30pm yesterday on Browns Rd in Manurewa.
One of the young girls involved had now been referred to Youth Aid. No one was injured during the fight.
The video footage, taken on a cellphone, shows a dozen or so girls involved in a fight and two officers trying to stop it.
It was uploaded to Facebook yesterday and has been viewed more than 790,000 times, shared more than 5000 times and has topped 15,000 likes.
Counties Manukau Central Area Commander Inspector Julia Lynch said it was the latest in a string of "absolutely disgusting" behaviour organised by young people on social media.
Police were working hard to identify all of the young people involved in the fight, she said.
"It is concerning that these things are happening. We've got young people on social media...organising crimes, looking at stealing cars, doing ram raids, aggravate robberies and obviously organised fighting as well.
"It's absolutely unacceptable. The behaviour is disgusting and shouldn't happen."
Police were extremely concerned about the growing trend of organising crimes via social media, Insp Lynch said.
It was happening around New Zealand, but difficult to quantify exactly how often, and it was happening "really quickly."
The two officers were just at the right place at the right time, as police did not have any knowledge of the fight prior to starting, she said.
Officers were picking up children as young as 10 on the streets in the early hours of the morning, Insp Lynch said.
Fights in schools were not new - but the introduction of social media has heightened the issues, she said.
"This is the behaviour and the attitude that we're seeing more and more from some of our young people...there have always been school fights it's just now that we have social media it's instantaneous and people are posting things online.
"A lot of these young people think it's really cool to do that. It's actually not cool, it's stupid."
She was concerned and disappointed to see the group fighting off the officers who attended, she said.
Manurewa High School principal Salvatore Gargiulo said today he was "very disappointed that a group of girls have let themselves down".
Senior pupils had been on study leave this week, coming in only to sit exams. That had made it "hard to get a tag on conflicts", he said.
The school was not open today, but Mr Gargiulo said a group of staff members would be visiting students to "get to the bottom of what happened".
Other fights online
Last month, a mob of schoolboys from three different schools turned on a 19-year-old who was picking his little sister up from school, when he tried to stop them attacking a younger student.
Two students aged 17 and 18 were charged with assault for their part in a 60-student fracas between students from De La Salle and St Paul's colleges at Orakei Train Station last month.
In May, a 15-year-old girl was arrested following an assault in Kaikohe that was filmed and posted online. The assault happened at the bus depot on the corner of Mangakahia Rd and Broadway, Kaikohe.
In March, footage showed a girl crying as she was hit by another girl, before the fight was eventually broken up by bystanders. This video was shared 1500 times on Facebook, and viewed more than 73,000 times.
