About 800 people from six green groups on Thursday walked out of the ongoing United Nations climate talks, as they saw no signs of progress towards a new global emission-cutting deal.

The green groups include Greenpeace, WWF, Oxfam, ActionAid, the International Trade Union Confederation and Friends of the Earth.

The walkout came as the two-week conference, which aims to prepare for a global climate pact due to be agreed in 2015, are entering the final days with no signs of achieving any breakthroughs.

"Organisations and movements representing people from every corner of the earth have decided that the best use of our time is to voluntarily withdraw from the Warsaw climate talks," the groups said in a statement.

"The Warsaw climate conference, which should have been an important step in the just transition to a sustainable future, is on track to deliver virtually nothing," said the statement.

Developed and developing countries have been deadlocked, in particular, over setting up a mechanism requiring rich countries to pay developing countries for losses suffered due to global warming.