WELLINGTON : New Zealand Prime Minister Jacinda Ardern said Tuesday that authorities have found four cases of the coronavirus in one Auckland household from an unknown source, the first cases of local transmission in the country in 102 days.Authorities have detected four cases of Covid-19 in one household from an unknown source, and contact tracing is now underway to prevent further spread, Prime Minister Jacinda Ardern said late.“Together we have beaten the virus before," Ardern told a news conference. “We can do so again."Ardern said Auckland, the nation's largest city, will be moved to Level 3 from midday Wednesday.