There are six new cases of Covid-19 in managed isolation and quarantine facilities (MIQ) reported today.
In a statement, the Ministry of Health said there were no community cases.
It said the seven-day rolling average of new cases detected at the border is one.
It also said one previously reported case has now recovered.
New cases at the border:
The total number of active cases in New Zealand today is 18 and the total number of confirmed cases is 2,323.
Since 1 January 2021, there have been 65 historical cases, out of a total of 507 cases.
The total number of Covid-19 tests processed to date is 2,149,014.
There were 5,619 Covid-19 tests processed yesterday. The seven-day rolling average is 4,618.
Meanwhile in Victoria, officials are strongly considering extending the seven-day lockdown due to end at 11:59 on Thursday amid growing fears about rapid transmission in settings never seen before.
The ministry said an update on test results for travellers from Melbourne from 20-25 May is expected to be provided this afternoon.
"Ministry of Health officials will tomorrow conduct a risk assessment on the situation in Victoria before briefing Ministers ahead of a decision on the pause on Quarantine Free Travel."