Bay of Plenty police are investigating allegations of a "sexual nature" involving students at Opotiki College, Detective Inspector Mark Loper says.
There was no indication any alleged offending happened at the school, or that any members of staff were involved, he said.
"Police are in the initial phases of the investigation and are taking the matter seriously."
"Police are following all proper processes, including working closely with the young people concerned, their families, the school and other agencies to ensure the proper support and resources are in place."
That had involved talking to a number of students and their families, and giving those people ongoing support, Mr Loper said.
"Our priority is the well-being of the young people who have provided the information and we have spoken to their families about how we will progress from here."
Mr Loper said he appreciated there was concern in the community but asked for patience while the allegations were carefully and methodically investigated.
Ministry of Education spokesperson Katrina Casey said the allegations were concerning and it was working with the school.
The school was receiving support from a number of agencies, helping to minimise disruption to school life, she said.
Anyone with information could call Mr Loper on (07) 348 0099 or CrimeStoppers on 0800 555 111.
