By Te Aniwa Hurihanganui of RNZ
Three students have been excluded from Feilding's Hato Pāora College after a police investigation into what the boarding school is calling "inappropriate sexual behaviour".
The alleged incident involved a group of boys in a school dormitory in mid-June.
The school's trust board chair Tata Lawton said the school acted quickly when it learned what had happened.
"The school learned of the incident within days of it happening and notified parents, Police, Oranga Tamariki and the Ministry of Education immediately. They then enacted their own investigation.