Jacinda Ardern said that genome sequencing has detected the Delta strain, and that it originated in NSW.
"We are dealing with the Delta variant ... our case has originated in Australia."
"Now the job is to work out how and when it got here,” Ms Ardern said.
The NZ Government will examine whether the positive case leaked from one of the country's managed isolation facilities
New Zealand has detected an additional two COVID cases, bringing the total in the current outbreak to seven.