A Northland mayor says any "underground" community transmission, will be nasty.

The Covid-positive woman who travelled around the region still isn't divulging where she's been.

Authorities have identified her travel companion, but haven't been able to locate her.

Whangarei mayor Sheryl Mai told Heather du Plessis-Allan there are too many unanswered questions and Northlanders are paying the price.

“I’m just really hopeful that we don’t have some community spread we don't know about because people aren't getting tested because they’re afraid of coming forward.”

Northland is staying in Alert Level Three until midnight Thursday.

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