The president said the U.S. naval blockade of Iranian ports would remain in effect until "an agreement is reached, certified, and signed."

Iran's Fars news agency says Trump's assertion that an agreement was nearly final was "inconsistent with reality".

May 23 (Reuters) - U.S. President Donald Trump said on Saturday that a memorandum of understanding on a peace deal has been "largely negotiated" with Iran and will open the Strait…