DEAUVILLE, France: Russia, Japan and Canada told the G8 they would not join a second round of carbon cuts under the Kyoto Protocol at United Nations talks this year and the US reiterated it would remain outside the treaty, European diplomats have said.

The future of the Kyoto Protocol has become central to efforts to negotiate reductions of carbon emissions under the UN's Framework Convention on Climate Change, whose annual meeting will take place in Durban, South Africa, from November 28 to December 9.

Developed countries signed the Kyoto Protocol in 1997. They agreed to legally binding commitments on curbing greenhouse gas emissions blamed for global warming.

Those pledges expire at the end of next year. Developing countries say a second round is essential to secure global agreements.

But the leaders of Russian, Japan and Canada confirmed they would not join a new Kyoto agreement, the diplomats said.