Talks on Iran's nuclear program ended in a stalemate Saturday, despite the Bush administration's decision to send an official for the first time.
An hour into the talks, Iran "ruled out any freeze on its uranium enrichment program," the Associated Press reported.
Six world powers entered talks hosted by Switzerland in hope of a compromise: Iran ceases to expand its nuclear program and no new sanctions will be placed on the country.
But there is "no chance" of that, the Iranian delegation said.
Iran has defied three sets of UN sanctions, saying it has the "right to nuclear technology for peaceful uses."