A police spokesperson said they are making inquiries into the incident, and were working with the school.
“Police responded to a disorder at a school in Melville just after midday yesterday. One person has been arrested for assaulting police,” the spokesperson said.
Meanwhile, parents on social media have been saying they are too scared to send their children back to school.
One said they intended keeping their child home for the rest of the week, as they did not feel the school was safe.
RNZ has approached both the school and the police for comment.
Mangakōtukutuku College was established this year on the old Melville High School site, after both Melville High and Intermediate Schools were closed by the Ministry of Education.