A picture released by the official website of Iran's supreme leader, Ayatollah Ali Khamenei, shows him delivering a speech in Tehran on November 20, 2013Negotiations between world powers and Iran over Tehran's nuclear ambitions had been thrown into uncertainty Saturday after US Secretary of State John Kerry introduced his coming near near departure and Iran's chief negotiator expressed doubts a deal would be reached. Amid signs that the talks in Geneva had been proving tough, Kerry's spokesman mentioned the U. S.'s prime diplomat would leave for London on Sunday for conferences with British counterpart William Hague and the Libyan prime minister. On the related time, Iranian chief negotiator Abbas Araqchi stated he doubted that Tehran and the P5+1 world powers — comprising the US, Britain, France, China, Russia and Germany — might reach an accord by way of the top of the day.

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