Parliament has increased security measures in preparation for a possible second protest in Wellington tomorrow.
Police confirmed yesterday they were aware of planned protest action outside Parliament from 9am.
Prime Minister Jacinda Ardern said she was not entirely clear what the protesters' motivation was.
"I see the same reporting and information as others. The police, of course, will be no doubt be looking at what needs to be done in advance to ensure that we don't have a repeat of what we saw previously with the disruption to Wellingtonians."
A 23-day anti-vaccine mandate occupation was brought to an end earlier this month. The lawns of Parliament were set alight and more than 100 protesters arrested.