Seven new cases of COVID-19 have been detected in New Zealand's managed isolation and quarantine facilities since the last update on Monday.
It follows Monday's figures of four imported coronavirus cases.
New Zealand remains free of any known COVID-19 infections in the community.
A Ministry of Health spokesman said of the new cases detected at the border, three are part of the group of international mariners who arrived in the country last Wednesday from Russia via Singapore. They're currently in quarantine at a Christchurch facility.
In total, 17 COVID-19 cases have been detected in the group of 150 mariners; eight of which are active and nine historical.
The remaining four new cases on Wednesday are from India via the UAE, Puerto Rico via LA, and two directly from United States. They all arrived on Thursday, the ministry said.
Meanwhile, one of New Zealand's previously reported cases is now not considered a case but remains under investigation as a possible historical infection. This case arrived from the US on January 4 and is awaiting a second test result.
The country's active number of cases is 62 with total confirmed infections standing at 1872. New Zealand laboratories have processed 1,448,199 COVID-19 tests since the pandemic began.
'Can't afford to get complacent'
Director-General of Health Ashley Bloomfield is again reminding New Zealanders to support the country's contact tracing systems by using the COVID Tracer app.
"We can't afford to get complacent - especially given the increasing numbers of new cases we're seeing in many other countries," Dr Bloomfield said in a statement.
"We've seen how quickly the virus can spread. We all have a responsibility to support contact tracing by keeping a record of our movements, either with the app or by another method such as a diary."
Health officials say contact tracing will help break the chain of transmission faster should there be a community outbreak of COVID-19.
"It's incredibly important we all scan the QR codes wherever we see them, as the more we all scan, the safer we'll all be," Dr Bloomfield said.
"If you can't scan then please keep a record of where you have been."