New Zealand police have found the COVID-19 runaway who forced the Northland region into lockdown as Kiwi officials race to trace her contacts on a day 43 new community cases were recorded.
Director-General of Health Ashley Bloomfield announced the new cases on Tuesday, with 40 of them coming in Auckland.
The Delta outbreak has spread from NZ's biggest city into Northland courtesy of two women who used fraudulent documents to travel north.
Authorities were alerted to the pair last Thursday when the first woman showed COVID-19 symptoms and turned herself in for testing.
When she refused to co-operate with contact tracers and returned a positive test, the government threw the region into lockdown as a precaution.
The second woman remained on the run until Monday night, when police found her in West Auckland.
Unhelpfully for the fight against the virus, neither have co-operated with contact tracers.
"Police have got a reasonably good understanding (of where they have been) using transactions and phone records of where the people were broadly," Doctor Bloomfield told Radio NZ.
"What we really want to know is the places (they have been) and more detail around those places ... it's important and it's incredibly helpful."
On Tuesday morning, health officials announced the second woman had also tested positive for the deadly virus.
"The big question is, 'Were they infectious out in the community in Northland?'," Dr Bloomfield asked.
"That's why we need to know where they were and get on and test people they may have had contact with."
Health officials have confirmed 18 contacts from the first woman: nine from Northland, seven from Auckland, one from Wellington, and one still to be determined.
A number of New Zealand media outlets have suggested the women are sex workers: this has not been substantiated by officials, who believe they travelled to Whangarei, Kamo, Paihia and Kawakawa.
Northland, like the Waikato to Auckland's south, is in lockdown until at least Friday owing to the pair's trip.
So far, there have been no further cases picked up in Northland, and Dr Bloomfield said he was "encouraged" by negative wastewater testing.
On Monday, Prime Minister Jacinda Ardern lengthened Auckland's lockdown, meaning NZ's biggest city is certain to be under lockdown restrictions for at least 10 weeks.
"New Zealand is at one of the trickiest and most challenging moments in the COVID-19 pandemic so far," she said.
Ms Ardern revealed the 'R' value had breached one; a sign further growth and spread of the Delta outbreak was to come.
COVID-19 modeller Michael Plank said that meant New Zealand was "now in a race between the virus and the vaccine".
"We need to do everything we can to slow the virus down and speed the vaccination program up," he said.
New Zealand's vaccination rates slightly trail Australia, with 80 per cent of the eligible population at least partially vaccinated, and 56 per cent double-dosed.
As of Tuesday, 34 New Zealanders are in hospital with the virus, including five in intensive care.