Pakistan, June 19 -- After Iranian Supreme Leader Ayatollah Ali Khamenei rejected Donald Trump's demand for unconditional surrender on Wednesday, the US president said his patience had run out, though he gave no clue as to what his next step would be.

Speaking to reporters outside the White House, Trump declined to say whether he had made any decision on whether to join Israel's bombing campaign against arch-enemy Iran.

"I may do it. I may not do it. I mean, nobody knows what I'm going to do," he said.

Trump said Iranian officials had reached out about negotiations including a possible meeting at the White House but "it's very late to be talking," he said.

"Unconditional surrender, that means I've had it."

Asked for his response to K...