Health officials have confirmed a person who previously returned a "weak positive" test result in Northland has now been confirmed with Covid-19.
It was also revealed on Thursday night that an Auckland location of interest shows an infected person was out and about in the community on Wednesday afternoon - while transport bosses have confirmed another Covid-19 positive person had spent time at the site of a major Waikato roading project.
Earlier this week, a person provided what was described as a weak positive.
The Ministry of Health said that its current assessment is that the earlier weak result combined with the positive result yesterday indicated that the original test was taken in the early stage of the individual's infection.
Director of public health Dr Caroline McElnay said this would help limit any potential spread of infection from the case. Public health interviews with the case are now underway to confirm their movements.
Locations of interest in Auckland and Northland will be posted on the Ministry of Health website as they become available and updated as more information becomes available.
The first locations of interest are expected to be posted today.
"Northland DHB is stepping up its screening at Northland hospitals for visitors and patients and arranging additional testing. Anyone with symptoms should get tested and people in Auckland and Northland should check tomorrow for new locations of interest.
"The DHB is also encouraging vaccination at general practice, pharmacy, Māori health providers and DHB clinics."
Meanwhile, Super Liquor Mount Wellington was visited most recently on Wednesday between 12.15pm and 1.20pm. Anyone at the store during the time of possible exposure must self-monitor for Covid-19 symptoms for 14 days.
And Waka Kotahi NZTA has also confirmed that a sub-contractor who had been on part of its Waikato Expressway worksite late last week has also tested positive.
A spokesperson confirmed to Heather du Plessis-Allan on NewstalkZB that someone who had since tested positive had been on the Hamilton section of the Waikato Expressway late last week.
"Our contractors have been in contact with public health officials and are following guidance and direction provided by the Ministry of Health," the spokesperson said.
"All those who had contact with the individual on-site have been tested and have returned negative test results. Waka Kotahi takes seriously our responsibilities for the safety of our staff, contractors and members of the public. All of our worksites have comprehensive Covid-19 protocols and work plans in place for the various alert levels, which are strictly adhered to."
The Ministry of Health has released several new places of interest on its website.
• ASB Kelston Shopping Centre ATM Kelston: Corner West Coast and Great North Rd, Kelston. Wednesday September 29 , between 11pm and 11.15pm.
• ATM - Bank of New Zealand (BNZ) Waitakere: 18 West Coast Rd, Glen Eden. Wednesday, September 29 between 11pm and 11.15pm.
• Super Liquor Mount Wellington: 14/295 Penrose Rd, Mount Wellington. Saturday, October 2 between 1.15pm and 2.20pm, and Wednesday, October 6 between 12.15pm and 1.20pm.
• Z Manurewa: 1 Alfriston Rd, Manurewa. Thursday, September 30, between 11.38pm and 12.45pm.
• Lincoln Road Countdown Henderson:185 Universal Drive, Henderson. Friday, October 1, between 2pm and 3.30pm.
Two new west Auckland ATMs were visited by a person with Covid-19 last week. Anyone at these locations during the times of possible exposure must self-monitor for Covid-19 symptoms for 14 days.
The same advice goes for anyone who was at the Z in Manurewa on September 30 between 11.38am and 12.45pm.
• Four Square Parakai: 137 Parkhurst Rd, Parakai. Monday, October 4, between 6.15pm and 8pm.
• New World Kumeu: 110 Main Rd, Kumeu. Monday, October 4, between 5.15pm and 6.30pm.
• Alfriston Road Superette Manurewa: 44 Alfriston Rd, Manurewa East. Thursday, September 30, between 11.44am and 1pm.
• Southgate Superette: 17/230 Great South Rd, Takanini. Friday, October 1 between 6.05pm and 7.10pm.
Two locations of interest show a person infected with Covid-19 in the community earlier this week.
Anyone who visited Four Square Parakai and New World Kumeu on Monday during the times of possible exposure must self-monitor for Covid-19 symptoms for 14 days.
The same advice goes to anyone who was at a Manurewa and Takanini Superette last week.
• Lim Chhour Supermarket Manukau: 6 Lakewood Court, Manukau. Friday, October 1, between 2pm and 4pm.
• Persia Kebabs Wairau Valley: 168E Wairau Rd, Wairau Valley. Monday October 4, between 12pm and 12.30pm.
• That Cafe Takapuna: 5 Byron Ave, Takapuna. Thursday September 30 between 9.16am and 10am.
• Lim Chhour Supermarket Manukau: 6 Lakewood Court, Manukau. Thursday, September 30, between 4.12pm and 4.30pm.
• Pak'nSave Whitiora: 17 Mill Street, Whitiora. Friday, October 1, between 5.30pm and 7pm.
A Hamilton supermarket is the most recent Waikato location of interest to be linked to the growing cluster in the region.
Pak'nSave Whitiora was visited last Friday for an hour and a half by a person infected with Covid-19.
Any shoppers during this time must self-monitor for Covid-19 symptoms for 14 days.
Alongside the new location in Hamilton, a number of Auckland locations were released this afternoon.
Lim Chhour Supermarket in Manukau was visited twice by a person with Covid-19, the first was on September 20 between 4.12pm and 4.30pm, and then on October 1 for two hours. Shoppers during this time must self-monitor for Covid-19 symptoms for 14 days.
The same goes for anyone who was at Persia Kebabs Wairau Valley or That Cafe Takapuna during the times of possible exposure.
• Wainui Foodmarket: 2 Wainui Rd, Raglan
• Auckland City Mission: 23 Union St, Auckland central
The Auckland City Mission is now a location of interest after a person with the virus picked up a meal pack from there three days ago.
The mission's temporary branch on Union St - just around the corner from its better known base in Hobson St, which has been refurbished - was linked to an infected person on Monday between 9am and 12pm.
A person with the virus has also been identified in a new location of interest in Raglan - the Wainui Foodmarket. An infected person was there on Saturday between 5.20pm and 5.55pm.
Anyone who was at either place at any time is told to monitor their health for 14 days after exposure and get tested if symptoms start to show.
A West Auckland petrol station and a bakery in Onehunga were earlier identified as locations of interest.
• Royal Bakehouse: 150E Mt Smart Rd, Onehunga
• BP Connect Glendene: Corner of Norcross Ave, Glendene, and Te Atatū Rd, Te Atatū, West Auckland
A person with Covid was at the Royal Bakehouse, in Onehunga, last week on Tuesday morning between 10.30am and 10.45am.
An infected person also visited the BP Connect service station in Glendene, West Auckland, last week on Wednesday between 8pm and 8.15pm.
Anyone who was at either place during the affected times is advised to monitor their health for 14 days after being exposed and to get tested if symptoms start to develop.
Earlier this morning, two Four Square stores - one in Raglan and the other in Hamilton - were among places of interest identified.
Covid infected person at Hamilton shop three days ago
The Four Square Heaphy Terrace, in Hamilton, was visited by a person who tested positive for the virus three days ago, on Monday.
The affected time is between 6.50pm and 7.25pm.
• Four Square: 1030 Heaphy Terrace, Fairfield, Hamilton
• Swaffield Road Dairy: 26 Swaffield Rd, Papatoetoe, South Auckland
• Tasty Hot Bread Bakery: 533 Great South Rd, Manukau, South Auckland
• Four Square Raglan: 3 Bankart St, Raglan
• Z Sylvia Park service station: 510 Mt Wellington Highway, Mt Wellington, Auckland
Staff management issued a message to its customers on Facebook, saying the Ministry of Health had identified its staff and customers who were there during that time as casual contacts.
"This means anyone in-store at this time should self-monitor for Covid-19 symptoms for 14 days. If symptoms for Covid-19 develop, get a test and stay at home until you get a negative test result and until 24 hours after symptoms resolve."
Staff said its teams had been working to increase protocols since the lockdown in Auckland started in mid-August.
"All these remain in place, which means the store has been cleaned multiple times throughout the day, has implemented increased sanitation procedures, physical distancing and mandatory mask-wearing for customers and staff.
"It's been a challenging time for everyone. We ask you to please bear with the team as they work to meet your needs. Be kind, mask up."
The Four Square on Bankart St, in Raglan, is linked to a positive case who was there on Saturday October 2 between 9.45am and 10.45am.
A person with Covid was at the Z Sylvia Park service station, on Mt Wellington Highway, for about an hour on the same day. They were there between 11.45am and 12.47pm on Saturday.
On Friday, a bakery in Manukau and a dairy in Papatoetoe, South Auckland, were linked to a person with Covid.
Covid-infected person was at Kahikatea gas station on Tuesday
The Tasty Hot Bread Bakery, on Great South Rd in Manukau, had an infected person come through between 11.20 and 11.25am that day.
A member of the public with Covid was at the Swaffield Road Dairy, in Papatoetoe, for five minutes between 5.30pm and 5.35pm.
The latest anyone with the virus has been out in the community was two days ago on Tuesday afternoon.
A person who has since tested positive for the virus was at the Z service station at 1/124 Kahikatea Drive in Melville, Hamilton.
They were there for 15 minutes between 3.30pm and 3.45pm.