There are seven cases of COVID-19 worrying health officials as they are yet to be linked to the south Auckland cluster.
On Wednesday, Director-General of Health Dr Ashley Bloomfield announced five of the mystery coronavirus cases are associated with the Mt Roskill Evangelical Fellowship church.
Currently those five cases are linked to each other, but not to New Zealand's only current cluster in south Auckland.
"We haven't found the epidemiological link to the cluster and we are waiting for the whole genome sequencing," he said.
"We believe they will be linked but we haven't got the epidemiological link yet. They are like a mini cluster at the moment."
But when asked if he had considered the cases may be a separate cluster with no links to the south Auckland cases, Dr Bloomfield said: "We fully expect that it will link to the existing cluster".
The sixth unlinked case is a man who is currently in North Shore Hospital with COVID-19 and Dr Bloomfield said health officials are working hard to find the connection.
"The public health unit is going right back to see where this person may have been infected and in fact they are now looking at a private event which a number of people were at in very early August," he said.
"It's right at the boundary of possibility but they are doing a very thorough job. They have a list of people there and they are all being followed up as well. So they are leaving no stone unturned."
All of the man's close contacts have been identified and no family or work place contacts have returned a positive test for COVID-19. They are currently remaining in isolation for 14 days as a precaution.
The seventh case is "another person who had previously been in a MIF (managed isolation facility)," Dr Bloomfield said.
"Those are the only ones who haven't been linked that we know or consider are associated with the cluster."
New Zealand now has 1344 confirmed cases of coronavirus, which is the number reported to the World Health Organization.
