The issue of enrichment is highly sensitive, because the Western powers suspect that Iran wants to perfect this process in order to make nuclear weapons -- something that Tehran denies.
Iran's stated decision earlier to resume limited research activities into the fuel cycle has led to heavy criticism.
Following the IAEA statement, British Foreign Secretary Jack Straw ruled out military action against Iran in the international dispute over Iran's nuclear program but expressed to parliament his "profound concern" at that country's resumption of nuclear-fuel research.
Straw added that military action is not on Britain's agenda, nor on anyone else's, as far as he knows.
He also said Iran has the right to develop nuclear power plants but not nuclear weapons.
"Iran has an absolute right to develop nuclear power plants," Straw said. "It has no right, indeed, obligations not to do anything towards developing nuclear weapons facilities, and that is what is at issue."
But he confirmed that referring Iran to the UN Security Council -- a potential prelude to sanctions -- would be discussed when he saw his French and German counterparts in the coming days.
The U.S. White House said today that if Iran continues on its current course, it will leave the international community no choice but to refer Tehran to the UN Security Council for possible action.