Afghanistan, March 6 -- U.S. President Donald Trump said there would be no deal with Iran except "unconditional surrender," according to a message he posted Friday on the social media platform Truth Social.

Trump wrote that after such a step and the selection of "great and acceptable leaders," the United States and its allies would work to rebuild Iran and make it "economically bigger, better and stronger than ever before."

In the same post, Trump said Iran could have "a great future," adding the phrase "Make Iran great again." He had earlier urged Iranian soldiers to lay down their weapons and encouraged Iranian diplomats to seek asylum and help form what he described as a new Iran.

The comments came hours after Iranian President Masoud...