By Gram Slattery, Phil Stewart, Steve Holland and Jonathan Landay WASHINGTON (Reuters) -Roughly one month ago, from the stage at an investment forum in Saudi Arabia, U.S. President Donald Trump issued a warning to Iran that would prove prophetic.

Iran's supreme leader on Wednesday rejected Donald Trump's demand for unconditional surrender, as the US president said his patience had run out. Ali Khamenei rebuked Trump in a recorded speech, saying that "any US military intervention" would be costly and added: "The Iranian nation will not surrender.

US President Donald Trump has been accused of fueling the tension in the Middle East amid the escalated hostilities between Israel and IranLast week, Israel attacked Iran in an unexpected manner after decades of rivalry and prolonged shadowed war between the two countriesBut Trump in a social media post,