They were the first cases outside of managed isolation after New Zealand announced initial success in controlling the virus.
Panic buying returned to supermarkets, huge queues formed at COVID-19 testing stations and face-masked police manned roadblocks on major roads to enforce the new measures. He has no history of overseas travel.
Household contacts of the original case received a rapid test and three of these tests also came back positive, while three were negative, the ministry said.
One of those diagnosed was a preschooler.
Residents of Auckland, home to around 1.7 million people, were given just hours to prepare for the return to level 3 restrictions at midday (2400 GMT) on Wednesday, requiring people to stay at home unless for essential trips.
On Wednesday afternoon, four more people were being treated as probable cases.
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The country has recorded 22 deaths, even as case and death figures soar around the world.
Care homes were raised to the highest level of alert, meaning that residents must stay put except for essential travel and can not be visited by family members.
Destiny Church bishop Brian Tamaki has told his followers they should take to the streets if the Government announces an extension to the current three-day lockdown in effect in Auckland.
Contact with others should be kept to a minimum, with all schools and childcare centres, and most businesses, closed. Food delivery is available under level 3.
In the meantime, case numbers are expected to rise.
"The case is a wake up call for any complacency that may have set in. we have done this before and we can and will do it again".
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The graded and evolving response has resulted in a testing strategy that steadily widened the testing net in the country. There active cases in the country presently comprise 27.64 per cent of the total caseload.
"I know that the virus remerging in our community has caused alarm and the unknown is scary".
"We know the virus can survive within refrigerated environments for quite some time", Bloomfield said during a televised media conference. "And as a team, we have also been here before", Ardern said. "When we've rolled out our plans before it has worked", she said.
The restriction would be applied for three days until Friday, which she said would be enough time to assess the situation, gather information and make sure there was widespread contact tracing. "A 2nd swab has been taken today confirms the positive result" the New Zealand government tweeted from its official account.
A major city in New Zealand has been forced back into lock down, after recording four new cases of coronavirus.
In Christchurch on the same day, two retirement villages went into lockdown and residents were tested for Covid-19 after residents displayed flu-like symptoms. "That is a completely natural feeling".
"The race is on to find the source of the cases and break any chains of transmission", she said.
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The CPI increased by the same margin in June. "PPI has been in the negative in 12 out of 13 months to July". The Fed tracks the core personal consumption expenditures (PCE) price index for its 2% inflation target.
Bloomfield said two of the people who had tested positive had traveled to the city of Rotorua while suffering symptoms over recent days and had visited several tourist attractions.