July 18 (Reuters) - Iran's Supreme Leader Mojtaba Khamenei said in a written statement on Saturday that repeated U.S. breaches of a memorandum of understanding signed by the presidents of Iran and the United States had shown that President Donald Trump's signature was "utterly worthless and devoid of credibility."Washington and Tehran have exchanged strikes after a ceasefire agreement fell apart last week, raising fears of a return to all-out war.

Iran's Supreme Leader, Mojtaba Khamenei, has accused the United States of repeatedly violating its agreements with Tehran. He declared that the signature of the American…

Mojtaba Khamenei says Trump's signature 'worthless' as US reports two service members killed in Jordan and one missing.

Iranian supreme leader warns US of ‘unforgettable lessons’