Libya's new rebel rulers were hailed by world leaders in Paris on Friday and won the promise of a UN state-building mission, as fugitive strongman Muammar Gaddafi issued a new barrage of threats. Forty-two years to the day since Colonel Gaddafi stormed to power in a coup, senior envoys from 60 countries met the leaders of the revolution that overthrew him to endorse the fledgling regime and offer practical support. Russia, China and Algeria also agreed to extend their backing to the new government. As the talks began, UN Secretary General Ban Ki-moon said, he would work with the Security Council for an immediate United Nations mission to deal with a possible humanitarian crisis and help rebuild the war-ravaged country. Meanwhile, Anti-Gaddafi forces encircling the city of Sirte, have given the Gaddafi loyalists an extra week to negotiate their surrender. On the other hand, Gaddafi in an audio message carried by a loyalist TV channel, has said that he is ready to fight a long guerrilla war. The whereabouts of Gaddafi remain unknown.