New Zealand's Prime Minister Jacinda Ardern has ordered the country's biggest city Auckland to go into lockdown after the discovery of three new local cases of Covid-19.
The measures will last three days and require residents to stay at home.
Ms Ardern said the country was going "hard and early" after the cases were identified.
New Zealand has won widespread praise for its handling of the pandemic, going months without community transmission.
The country closed its borders entirely to almost all non-citizens or residents early on in the pandemic, aiming to eliminate the virus.
New Zealand, with a population of five million, has recorded just over 2,300 cases of Covid and 25 deaths.
The measures in Auckland require its 1.7 million residents to stay at home except for essential shopping and work. Schools and non-essential shops will close, and entry in and out of the city restricted.
Ms Ardern said three days should allow the government to get more information and get more testing done, and would also help determine if there was any community transmission.
"New cases of Covid-19 in the community was something none of us wanted to happen," Auckland Mayor Phil Goff said, adding the restrictions were the "best way to stamp out the virus".
Source: BBC