Senior Iranian lawmakers have rejected a U.N.-backed uranium enrichmentdeal designed to ease concerns about Iran's nuclear program.

Thehead of the parliament's national security committee, AlaeddinBoroujerdi, told state media Saturday the committee is opposed to theplan to have Iran ship its uranium abroad for further enrichment.

He added that there is no guarantee Iran would receive nuclear fuel in exchange, as the agreement stipulates.

Tehranis reported to have told the International Atomic Energy Agency that itwants nuclear fuel for its reactor before it will send enriched uraniumoverseas.

The IAEA proposal is aimed at preventing Iran from enriching uranium to the point that it can be used for nuclear weapons.

Theproposal has already been agreed to by the other parties involved inthe negotiations - the United States, Russia and France.

WhiteHouse spokesman Robert Gibbs says U.S. President Barack Obama's time isnot "unlimited" when it comes to nuclear talks with Iran.

Some information for this report was provided by AP and Reuters.