A violent video showing two students fighting (above) at an Adelaide high school was Airdropped to students and parents, despite the state

Up to 18 students have been suspended from a South Australian high school after breaking the new state-wide phone ban to plan and film a bareknuckle fight.

Disturbing footage showing the brawl between two students was spread around Underdale High School, in eastern Adelaide, on Friday.

The video shows at least a dozen other phones being used to film the lunchtime fight, despite phones being banned from South Australian schools from January 30.

Students and parents from the school reportedly received the footage in a mass Airdrop. 

Parents were not informed by the school of the incident until Saturday. 

A violent video showing two students fighting (above) at an Adelaide high school was Airdropped to students and parents, despite the state's phone ban in schools

A violent video showing two students fighting (above) at an Adelaide high school was Airdropped to students and parents, despite the state's phone ban in schools

The 'disturbing' video shows the two students fighting (above) while their peers watch on

The 'disturbing' video shows the two students fighting (above) while their peers watch on

A violent video showing two students fighting (above) at an Adelaide high school was Airdropped to students and parents, despite the state’s phone ban in schools

It is understood one of the students did not want to participate in the organised fight.

‘They have like a roster on who fights every day but I don’t know if it’s on paper, and they just start fighting each other,’ an anonymous student told Nine News.

‘Older kids were calling him names so he felt like he had to fight.’

One parent said they were ‘disgusted’ by the video.

Up to 18 students have been suspended from the school while police investigate the violent incident. Officers were spotted visiting the school on Saturday. 

Some 18 students were suspended while police continue to investigate the fight at Underdale High School (pictured, officers visiting the school on Saturday)

Some 18 students were suspended while police continue to investigate the fight at Underdale High School (pictured, officers visiting the school on Saturday)

Some 18 students were suspended while police continue to investigate the fight at Underdale High School (pictured, officers visiting the school on Saturday)

Education Minister Blair Boyer said the students filming the fight were able to sneak their phones inside the school by handing over fake phones at the gate.

‘They’re using the phones to orchestrate or organise the fight and the timing to record it and then distribute the footage on social media,’ he said.

‘I expect schools to take strong action which they’ve done here, come down on them like a tonne of bricks, which they’ve done here, and suspended those with the phones as well.’