Otahuhu College has become the 10th Auckland school to be linked to the current Covid-19 Delta outbreak cluster, which has grown to more than 200 cases.
In a post to Facebook, Otahuhu College in Auckland confirmed a person at the school had tested positive for Covid-19.
All students and staff are now being considered as close contacts and must isolate.
"The person was infectious when at school on Monday 16 August and Tuesday 17 August 2021," the post said.