Auckland is entering COVID-19 alert level 3 from midday Wednesday for three days.
It comes after four cases of the virus were found in Auckland's community on Tuesday.
Prime Minister Jacinda Ardern says it's important to take a "precautionary approach".
"At this stage, we have not yet been able to determine the source of these cases."
The rest of New Zealand is entering alert level 2 from midday Wednesday for three days.
"We need to take a much more precautionary approach until we can find the source of this case and make sure that we reduce the risk of the wider spread," Ardern says.
"As disruptive as it is, a strong and rapid health response remains the best long-term economic response."
More to come.
