The deputy principal of a South Auckland school where a vicious brawl between school girls broke out has slammed the brutal event, saying it made him feel "sick".
Shocking footage of Manurewa High School girls stomping and punching each other, as police try to break it up, has gone viral on social media.
Manurewa High School's Pete Jones said it looked like "red mist" had descended on the pack as they fought.
The video, which was uploaded to Facebook yesterday, has been viewed more than 790,000 times.
It has been shared more than 5000 times, and has topped 15,000 likes.
Watching the video was horrific, Mr Jones said.
"I've seen the footage...and it's horrible. As a parent, as a teacher, as a member of the community you just don't want to see that happening.
"You see them when they get into that state, that red mist, it's very difficult to break someone away from that and you saw that by the things that we're happening on the video. Horrible, and it makes you sick. I'm really sad to be here in these circumstances."
It was exam week at the school when the fight broke out, he said.
There would be serious consequences for the students involved - which could possibly include suspension - but it was up to the Board of Trustees to work out what that would entail, Mr Jones said.
"Our seniors have been on exam week this week so...it's a bit harder during that type of a week to keep track of everyone.
"Once we've worked with police to identify exactly who they are then there's processes within the school, so they'll be referred to the board of trustees. There's a consequence to actions," he said.
"We do everything in our power as a school to make sure our students are safe and where they're meant to be."
A father of two students at Manurewa High School told Newstalk ZB the street brawl, involving dozens of students from the school, was the talk of the town before it happened.
The fight was organised through Facebook, attended by around 50 teenagers either watching or participating.
Richard told the radio station his daughter told him everyone at the school knew about it.
"In this area the kids are crazy"
Palm Super Mart employee Gurtej Singh went outside to see what was happening when he heard loud "screaming and shouting" coming from outside the Browns Rd shop.
He saw a group of girls viciously fighting each other and two police officers trying to break it up, outside the shop next to his.
And it's not the first time a school fight has broken out in the area, he said.
"It happened about one and a half months ago, but not like yesterday's one. It's just normal.
"That time the police came early...in this area the kids are crazy.
"I hope it'll never happen again. They have to do something."
He said the previous fight also involved girls and boys in school uniform.
"Absolutely disgusting" behaviour: Police
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 - which could add up to 50 - 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.
It was happening around New Zealand, but difficult to quantify exactly how often, she said.
It was happening "really quickly", she said.
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 it kicking off, she said.
Officers were picking up children as young as 10 on the streets in the early hours of the morning, Ms Lynch said.
Fights in schools were not new - but the introduction of social media has heightened the issues, she said.
"That shouldn't happen but it is happening.
"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 police officers who attended, she said.
Both Ms Lynch and Mr Jones urged parents to keep an eye on their children, and know who their friends were.
She could not comment on the age of the students involved.
Ms Lynch said some children as young as 10 were caught in the trend of facilitating crime through social media.
Several agencies were available to help concerned parents, she said.
These included the Salvation Army, Youthline, Iosis, the Solomon Group and Strive.
Mr Jones said Facebook was involved but he could not comment on whether there was any link to bullying on social media.
He did not know how many of the student involved were from Manurewa High School, he said.
It was lucky "no one was seriously hurt", he said.
Ms Lynch said other young people involved could be referred to youth aid, as police investigate.
Mr Jones said he did not know why the latest fight had occurred.
"Not specifically, no," he said.
While Ms Lynch said the investigation was "ongoing".
"The important thing is that we will be following up with any student or past student that are identified as being involved in the fight yesterday."
A shopkeeper on nearby Gloucester Rd believed students were let out of school early because of exams.
"A lot of cops" and about 10 police cars suddenly arrived in the neighbourhood yesterday afternoon, he said.
The mass brawl was highly unusual, he said.
This is not the first time footage of fights involving high school students has appeared 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.
With additional reporting from: Nikki Papatsoumas and John Weekes