Iran says it has postponed further talks with Russia about a proposal to process uranium on Russian soil for use in Iran's nuclear plants.
Government spokesman Gholamhossein Elham told reporters in Tehran Monday the two sides will not meet late this week, as scheduled, but that a mutually convenient date will be set later.
Russia has been pushing for the plan as a way to ease international concerns that Iran might be aiming to produce weapons-grade uranium. Iran says its nuclear program is only intended to generate electricity.
Speaking on Sunday, U.S. Secretary of State Condoleezza Rice said a coalition of countries, including all members of the United Nations Security Council, are determined to prevent Iran from developing nuclear weapons.
Some information for this report was provided by AFP, AP and Reuters.