WELLINGTON: New Zealand police made a renewed push on Wednesday to end an anti-vaccine mandate protest that has disrupted the capital for the past three weeks, dismantling an encampment outside parliament and towing away vehicles.

Several fires broke out among tents just metres from the parliament building, sending up billows of smoke before being doused by police, a Reuters witness said, as officers tried to completely clear the grounds.

"It was an attack on our frontline police, it was an attack on our parliament, it was an attack on our values, and it was wrong," Prime Minister Jacinda Ardern told a news conference after saying earlier it was time for the protest to end.

Protesters had been given ample opportunity to leave, she said, adding that the gathering had been fuelled by misinformation and conspiracy theories.

Taking inspiration from truckers' demonstrations in Canada, hundreds of protesters have been blocking streets with trucks, cars and motorcycles, in a protest that has led to violent clashes.

Police said earlier that 60 people were arrested and they had "gained significant ground" in their initial effort to clear the protesters. At least three officers were injured, police said.

But while some protesters packed up their tents and left, others resisted by throwing full water bottles, fire extinguishers and chairs, and by shouting abuse at police.

Authorities used loudspeakers to warn protesters they faced arrest for trespassing on parliament grounds. They also used pepper spray on some protesters. A Reuters witness saw a man in his underwear pouring milk over himself to dull the effects of pepper spray.

The protest began as a stand against COVID-19 vaccine mandates but was later joined by groups calling for an end to all pandemic restrictions.

"We are fighting for our standard of life. We want our sovereign right to our bodies," said Kate Siegert, who is unvaccinated, as she watched protesters move forward to block police advances.

Siegert, who has made several trips from her home in Auckland 640 km (400 miles) away to join the protest, said she lost her job because of mandates requiring vaccination for those working in the health industry.

At least 10 children were seen within the protest area and police said they had concerns for their wellbeing.

A country of five million people, New Zealand imposed tough anti-virus curbs that restricted its cases to just over 118,000 and 56 deaths, far lower than in many developed countries. But fuelled by the Omicron variant, daily infections are currently hovering near record levels.

About 95% of eligible people are vaccinated with two doses, with shots mandatory for some staff in front-line jobs.

Julie Thompson, who said she was a registered nurse and unvaccinated, stood watching the fires as she nursed a swollen finger that she said had been broken when police pushed her off a park bench.

"This is the end result of not talking to your people," she told Reuters. "It has galvanised people."