US Secretary of State Mike Pompeo has threatened to place “the strongest sanctions in history” on Iran if its government does not change course.
Mr Pompeo called for a new nuclear agreement with Iran following President Donald Trump’s withdrawal from the 2015 nuclear deal.
He said the Trump administration prefers for it to be a treaty that is ratified by Congress.
Mr Pompeo set out a list of 12 “basic requirements” for Iran that he says should be included in the deal.
He said Iran must “stop enrichment” of uranium and never pre-process plutonium. Iran must also allow nuclear inspectors “unqualified access to all sites throughout the country”.
Mr Pompeo said Iran must also “release all US citizens”, end support for Houthi rebels in Yemen, “withdraw all forces” from Syria and stop threatening Israel.