Iran has rejected European demands to freeze additional parts of its nuclear program, saying it will accept no "new obligations" from the international community.
Foreign Minister Kamal Kharrazi said Saturday, Iran will continue operating a facility to convert uranium to gas and will go ahead with plans to construct a heavy water reactor.
Iran insists the facilities are solely used for generating energy.
Earlier this week, Britain, Germany and France demanded the programs be stopped in a draft resolution presented to the International Atomic Energy Agency, saying they could be used to make weapons. The document is scheduled to be debated at a IAEA board meeting beginning Monday.
Iran has already promised to suspend its uranium enrichment program. The United Nations does not define Iran's uranium conversion facility and water reactor as enrichment sites.