DUBAI (Reuters) - A member of Iran's negotiating team at ongoing nuclear talks in Switzerland denied reports that the two sides are closing in a 2- to 3-page preliminary accord, state news agency IRNA reported on Saturday. Majid Takht-Ravanchi told IRNA there been no discussion of such an accord, IRNA said. Reuters reported on Friday that Iran and world powers -- the United States, Britain, France, Germany, Russia and China -- were getting close to such a deal, citing senior Iranian and Western officials. ...