The UN Security Council is to vote later today on a draft resolution aimed at stepping up pressure on Sudan to bring peace to its Darfur region.
The US submitted a final draft with minor changes to try to win support from Russia, China and other Security Council opponents.
The last draft, circulated late yesterday, still threatens sanctions if the Khartoum government fails to rein in militias ravaging western Darfur, and calls for an international commission to investigate alleged human rights violations and whether or not acts of genocide occurred - two issues raised by the opponents.
US Ambassador Mr John Danforth said the US had at least nine "yes" votes for the resolution, the minimum needed for adoption, and several council diplomats said there would probably be at least 11 votes in favour.
But it wasn't clear what China, which threatened to veto the original draft, would do about the latest text.
Before the final draft was released, China's UN Ambassador Wang Guangya said Beijing was concerned that the resolution "will be a recipe for failure for the peace talks" aimed at ending the crisis that has killed more than 50,000 people and forced over 1.2 million to flee their homes.
The revised version - the third the US has submitted in as many days - came a day after UN Secretary-General Kofi Annan called for immediate UN action to halt attacks against civilians in western Darfur, which he said were continuing despite the government's promise to rein in the marauding militias.