WELLINGTON/PARIS - Authorities in the French-ruled Pacific island of New Caledonia shut the international airport, imposed a curfew in the capital and called for police reinforcements after protests over the territory's voting system turned violent.

Rioters burnt cars, houses and supermarkets, shot at police and set up barricades amid plumes of smoke, authorities said, with tensions focused on plans to change New Caledonian's voting statutes.

Local broadcaster NC La 1ere reported unspecified loud bangs being heard ahead of an evening curfew.

"The streets were on fire, they were rioting in the streets, quite a frightening experience actually," New Zealand tourist Mike Lightfoot told TVNZ television.

The proposed changes would allow French residents who have lived in New Caledonia for 10 years to vote in provincial elections - a move local leaders fear will dilute the vote of indigenous Kanak

"We came through some very peaceful protests back towards (New Caledonia's capital) Noumea but as we got closer to Noumea we could see that things were getting out of hand," he said. "They had the roundabouts all on fire, black smoke."

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Interior Minister Gerald Darmanin said he was sending in police reinforcements.

"I strongly condemn this violence," he said, adding that 54 police had been injured. Some 82 people have been arrested over the past two days, he told reporters.

"Our priority is to re-establish order and calm," Prime Minister Gabriel Attal said, adding that he also wanted to see better communication between all parties involved.

Violence flared up as lawmakers in France's National Assembly discussed a draft law to change New Caledonian's voting statutes, with a final vote scheduled later on Tuesday.

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The proposed changes would allow French residents who have lived in New Caledonia for 10 years to vote in provincial elections - a move local leaders fear will dilute the vote of indigenous Kanak.

'Kanak land'

At a peaceful protest march on Monday, in Poindime, New Caledonia, people wove banners reading "This is Kanak land" and "No to enlarging the electorate".

"We hope that our voice, our dignity and our pride of being the people of Kanaky, will be heard by the National Assembly," an unidentified woman said.

Darmanin said on X that the proposed new election rules were "a moral duty for those who believe in democracy", but should not stand in the way of attempts to reach a larger political agreement.

Darmanin, whose portfolio includes France's overseas territories, was tasked by Macron with sealing a deal with Kanak leaders on the future status of New Caledonia after decades of political tensions.

New Caledonia is 20,000 km from France and 1,500 km east of Australia, with a population of 270,000 including 41 percent Melanesian and 24 percent of European origin, mostly French

Macron's office at the weekend said the president would invite representatives of the territory's population to Paris for talks to reach a peaceful settlement.

The French government has been negotiating a rescue package for the loss-making New Caledonian nickel sector, including a commitment to supply Europe's battery supply chain, but talks have stalled amid current political tensions.

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Nickel miner Prony Resources said it activated a crisis unit to "maintain our industrial facilities and prevent any damage to our assets". French miner Eramet did not immediately reply to a Reuters request for comment about its subsidiary there.

New Caledonia is 20,000 km from France and 1,500 km east of Australia, with a population of 270,000 including 41 percent Melanesian and 24 percent of European origin, mostly French.

A 1998 Noumea Accord helped end a decade of conflict by outlining a path to gradual autonomy and restricting voting to the indigenous Kanak and migrants living in New Caledonia before 1998. The accord allowed for three referendums to determine the future of the country. In all three, independence was rejected.