U.S. , Iran holds talks on margins of multilateral talks on Iran 's nuclear plans . The sources would talk only on the condition of anonymity because of the sensitive nature of the ongoing discussions with Iran . ` Obama says talks are ` ` constructive '' , but demands more . Foreign Ministry chief confirms another round of talks coming . Newly revealed Iranian uranium facility is focus for Western powers .
U.S. , Iran holds talks on margins of multilateral talks on Iran 's nuclear plans . Obama says talks are ` ` constructive '' , but demands more . Foreign Ministry chief confirms another round of talks coming . Newly revealed Iranian uranium facility is focus for Western powers .