Police plan to have a strong presence at Rosehill College tomorrow morning in response to fears from students and parents after violent brawls at the school.

Around 150 people were allegedly involved in a fight at the South Auckland high school this afternoon with sickening footage of the violent brawl circulating on social media.

The fight broke out about 2pm. There are claims it involved both students and parents.

Video footage posted on Facebook shows a large group of students in uniform attacking each other with punches and kicks.

Inspector Tony Wakelin told the Herald police are aware of safety concerns from students and parents and police would be present at the school as a precautionary measure.

police were making inquiries into today's incidents at the school and Wakelin said it was too early to comment on the circumstances.

"We appreciate there are a number of different reports around what happened at the school and that is why we are looking further into the matter to establish any person's potential involvement," he said.

A parent of a student at the college who is too scared to send his daughter back to class tomorrow told the Herald the fight was believed to be in retaliation to another fight between two male students yesterday.

"There was a big fight yesterday and one kid in particular got bashed over, then his parents came down with weapons to the school today, basically as retribution I am guessing."

Two students from the school also reported that the parents were from rival gangs, believed to be the Mongrel Mob and Black Power.

"More than 150 people were fighting. It spilled out from the field onto the court. The field at Rosehill is quite large and it was overflowing," the student said.

A group who anonymously messaged the Herald are calling for the school to take action and undertake a "serious investigation".

"In the light of recent events we as Rosehill students and teachers, demand action by the school and board of trustees. To undertake a serious investigation into the punishments for students who create an unsafe learning environment for others.

"We believe the current system in place is not strong enough and leading to a decline in pride and mana within the Rosehill College name. This must be sorted as soon as possible before any repeated actions take place.

"If this is not taken seriously we will know the students wellbeing and ability to strive for excellence is not taken seriously," they wrote.

Another group of students told the Herald they weren't happy with how the school was dealing with the violence.

"A text sent out by the school said police were called out for precautionary measures but it certainly wasn't precautionary.

"They need to stop lying to the parents about the state of the school and start caring about student mental health."

Police went to Rosehill College in Papakura after 2pm, just minutes after getting reports of students fighting. Photo / Google