Iran has not yet given its answer to a UN-backed uranium plan, only expressed its "positive attitude" and willingness to hold talks on the proposal, according to the state news agency IRNA.
Under the plan, Iran would ship most of its low-enriched uranium abroad for further enrichment to produce fuel for a Tehran research reactor.
IRNA quoted an unidentified official saying Friday that Iran's message to the UN nuclear watchdog a day earlier "did not contain a reply" to the plan. The official said Iran would give its "viewpoint" on the plan in further talks.
IRNA said Iran demands that there be a simultaneous exchange of uranium for the reactor fuel, adding, "Iran will in no way neglect this condition."