Iranian President Hassan Rouhani said on Saturday that Iran's atomic agency was ready with "expected and unexpected" reactions if Washington pulls out of the nuclear deal.
"Our Atomic Energy Organization is fully prepared ... for actions that they expect and actions they do not expect," Rouhani said in a speech carried by state television, referring to a possible decision by US President Donald Trump to leave the accord next month.
The deal reached between Iran, the United States and five other world powers put curbs on Iran's nuclear program in exchange for sanctions relief.
Trump has called the agreement one of the worst deals ever negotiated. In January he sent an ultimatum to Britain, France and Germany, saying they must agree to fix what the United States sees as the deal's flaws or he would refuse to extend the critical US sanctions relief that it entails.
Iran has said it will stick to the accord as long as the other parties respect it, but will "shred" the deal if Washington pulls out.
"Iran has several options if the United States leaves the nuclear deal. Tehran's reaction to America's withdrawal of the deal will be unpleasant," Iranian state TV quoted Iranian Foreign Minister Mohammad Javad Zarif as saying in New York.
