A top Cabinet MP used language stronger than his own Prime Minister and the Health Minister, saying two new New Zealand cases of Covid have highlighted unforgivable and unacceptable "ineptitude".

Police Minister Stuart Nash told Newstalk ZB's Mike Hosking that someone needed to be held to account after the two women flew in from the UK, were allowed out of isolation in an Auckland hotel early, and made a road-trip to Wellington.

There, they took tests for Covid and tested positive. Their tests mean Covid is active again in New Zealand.

"I cannot repeat the words on your show that I said when I heard what had happened," Nash told Hosking, using language far stronger than Health Minister David Clark and Prime Minister Jacinda Ardern.

"Someone does need to be held to account. We need to have a review of what's happening in quarantine because it's totally inacceptable, when five million Kiwis do it real tough.

"To get this sort of ineptitude, man it is unforgivable. As David said, he's cancelled compassionate dispensation and there's a review of the system. Let's make sure it doesn't happen again."

Listen to the audio above as politicians Mark Mitchell and Stuart Nash speak to Mike Hosking