There have been four new cases of COVID-19 detected in managed isolation in the past two days and none in the community, the Ministry of Health said on Sunday.
There is also a new historical case - not considered to be infectious.
Four previously reported cases have recovered bringing the total number of active cases in New Zealand to 24.
On Friday 4843 tests were processed, and 3257 were processed on Saturday, the ministry said. The seven-day rolling average up to yesterday is 3,729 tests processed and the total number of tests processed to date is 2,026,948.
The Ministry of Health also provided an update on Western Australia - where three community cases of COVID-19 were detected on Saturday, forcing quarantine-free travel to be temporarily suspended.
"Western Australian health officials have advised a worker at a Perth managed isolation facility had tested positive for COVID-19, along with two of their housemates," the ministry said in a statement.
"The Ministry of Health carried out a rapid public health assessment on the impact for New Zealand last night and, after working with airlines, all direct passenger flights from Perth to New Zealand were paused."
Western Australia health officials have yet to make a decision on implementing further restrictions and are meeting on Sunday morning to determine this.
Due to the time difference with Western Australia, further information is expected to be released about this later on Sunday.
Brisbane Airport green zone breach
So far 27 people have been in touch with New Zealand's Healthline to say they were in the locations of interest at the relevant time, the ministry said. Those people are considered casual plus contacts and have been asked to self-isolate and get tested five days after their exposure.
It comes after a traveller from Papua New Guinea breached Brisbane airport's green zone tested positive for COVID-19 earlier this week.
"Contact tracing teams have identified there were 397 passengers aboard the three flights which left Brisbane International Airport after the green zone breach on Thursday, April 29," the ministry said.
"All but two of those people have now been contacted and asked to check the Queensland Government website for locations of interest. Attempts to contact the remaining two are continuing."
The remaining passengers who weren’t at the locations of interest are advised to monitor their health and if symptoms develop, call Healthline and get a test. The ministry said the risk from the event remains low.
