The resumption of talks came as Mahmoud Ahmadinejad, the Iranian president warned that he could scupper America's Middle East policy if the US continued to confront his government.
The closed door meeting at the US mission to the United Nations in New York included envoys from the five veto-wielding members of the UN Security Council - the United States, Britain, France, Russia and China - plus Germany, Telegraph.co.uk reports.
The United States and its Western allies are pressing for quick adoption of an array of tough sanctions, but Russia and China are still hoping that diplomacy will lead Iran to the negotiating table and have indicated they will only agree to much weaker measures if Tehran refuses.
After more than three hours of talks, Russia's U.N. ambassador, Vitaly Churkin, and China's U.N. ambassador, Li Baodong, both called the discussion "very constructive" and Churkin said the six would meet again "very soon.", The Associated Press informs.