A west Auckland high school is closed for a deep clean after a student tested positive for COVID-19.
St Dominic's Catholic College will close for three days while it is being cleaned.
Principal Anna Swann wrote in a letter to parents that the school was told about the infections on Tuesday afternoon and won't reopen until Monday.
"I understand that this may cause some feelings of worry and concern among some families, but I want to reassure you that we are being closely guided by the Ministry of Education and the Ministry of Health," Swann said.
"The only people permitted onsite during this time [while it is closed] are our cleaning contractors."
Swann urged people not to disclose the identity of the infected student or their family and discouraged children from speculating on social media too, fearing it could lead to online bullying and abuse.
Nearby Holy Cross Catholic School said on Facebook it is taking a "very cautious" approach to the St Dominic's case.
"I have just heard that St Dominic's College is closed for three days for deep cleaning due to a COVID case. I am requesting that you keep any children home who have a sibling at the College," its principal Janice Borsos said.
It comes as six new COVID-19 cases were announced in New Zealand on Tuesday - four in the community and two imported.
Each of the four new cases in the community is linked to the Mt Roskill Evangelical Fellowship Church sub-cluster, which is part of the wider Auckland cluster that was first detected on August 11.
The number of active cases currently sits at 123, of which 80 are in the community.
The Ministry of Health didn't confirm the case when asked by Newshub. Instead, it said: "Our next update is scheduled to be at 1pm Wednesday. If there's anything to report before then, we would be in touch."