Iran's parliament has ordered the resumption of nuclear processing activities.
But Iranian officials say implementation of the order will be delayed to give one last chance to talks with the European Union. EU foreign ministers and Iran are expected to meet within the coming days.
Iran had previously agreed to suspend its nuclear processing program to avoid sanctions from the United Nations.
Iran says it wants to use the processed nuclear material to produce electricity. But the EU and the United States worry that Iran could be developing nuclear weapons.
France, Britain, and Germany want Tehran to abandon its enrichment activities in exchange for economic aid and backing for Iran's efforts to join mainstream international organizations.
Some information for this report provided by AP and AFP.