Iran's top nuclear negotiator insisted Thursday that bilateral talks should continue on a Russian offer to enrich uranium for Iran, and warned that handing over the nuclear issue to the UN Security Council - as the United States has demanded - would kill Moscow's initiative. "America is lying, trying to destroy the Russian proposal," Ali Larijani said at a news conference. "The Americans' insistence on handing over the Iranian nuclear dossier to the UN Security Council means the destruction of the Russian proposal," he continued. Larijani said his team had put forward a "package proposal" in Wednesday's talks in Moscow, denying that the discussions had ended in failure. "We need to give diplomats time to look at it," he said.