Washington: Susan Rice, the US Ambassador to the United Nations, said on Friday that progress has been made toward drafting tough new sanctions against Iran but declined to predict when they would be imposed.
"We are going to continue our efforts in New York and in capitals through the beginning of next month and as long as it takes," Rice told reporters during a visit to Washington.
"We are working continuously with our partners on the P5-plus-1," she said when asked for an update on the negotiations.
She was referring to the United States, Russia, China, Britain and France -- the five permanent veto-wielding members of the UN Security Council -- plus Germany, which have been leading efforts to curb Iran`s nuclear ambitions.
China has proved to be the main holdout to tough new sanctions against Iran.
"Those discussions have been happening with a significant pace and intensity," Rice told reporters.
"I think they have yielded progress. We have some continued work to do. I think that they are worthwhile and we expect further progress to come," she said.