Officials from six world powers have expressed disappointment at Iran's refusal to accept a proposal to send its uranium abroad for further enrichment and are urging Iran to reconsider.
European Union official Robert Cooper says Iran has not responded "positively" to the United Nations-brokered plan aimed at alleviating international concerns that Iran is developing atomic weapons.
Cooper spoke after representatives from Germany and the five permanent members of the U.N. Security Council, the United States, Britain, France, China and Russia held talks Friday in Brussels about Iran's nuclear program.
Iran's Foreign Minister Manouchehr Mottaki has said his country will not process its enriched uranium abroad and will consider only a uranium-for-fuel swap inside Iran.
On Friday, the head of the U.N. nuclear agency, Mohamed ElBaradei, urged Iran to accept the offer. He said he hopes Iran will not miss what he called a "unique but fleeting opportunity."