A parent of a student at Mt Roskill Grammar School in Auckland has reportedly tested positive for COVID-19.
According to an email sent to parents by the school, the parent arrived in New Zealand from Europe on March 12 and went to the school's Tongan Fiafia event that evening.
Their child attended school until Thursday March 19 and does not have symptoms.
"We have sought the urgent advice of the Ministry of Education and Ministry of Health," the email reads.
"Health authorities are contacting the few people who are considered close contacts. We have received initial advice from the Auckland Regional Public Service that most people who attended the event, and the wider school community, will not have been exposed to the person and therefore are not at risk."
Newshub has contacted Mt Roskill Grammar School.
According to the new pandemic alert system, revealed on Saturday by Prime Minister Jacinda Ardern and Director-General of Health Ashley Bloomfield, at alert level two each school will only close if there is a confirmed case of COVID-19.
Schools will otherwise remain open until New Zealand hits level four, meaning sustained community transmission like has been seen in the US, UK and Italy.
"I can assure you we are constantly monitoring these settings to keep children safe," Ardern said. "As a mum, I can assure you that is my key consideration."
At his 1pm media briefing on Sunday, Dr Bloomfield said there were five new cases identified in Auckland in the past 24 hours. He said all the new cases were in self-isolation.