US president Donald Trump warned Monday that Iran is "playing with fire" after Tehran said it exceeded a limit on enriched uranium reserves under a 2015 nuclear deal abandoned by Washington.
Israel urged European states to sanction Iran, while Russia voiced regret but said the move was a consequence of US pressure, which has pushed the deal towards collapse.
Britain called on Tehran "to avoid any further steps away" from the landmark deal, and the UN said Iran must stick to its commitments under the accord.
"Iran has crossed the 300-kilogram limit based on its plan" announced in May, foreign minister Mohammad Javad Zarif told semi-official news agency ISNA.
