U.S. President Donald Trump warned that Iran could be destroyed "in one night," as Tehran rejected a U.S.-backed ceasefire proposal and negotiations showed signs of breaking down.

"The entire country can be taken out in one night, and that night might be tomorrow night", Trump said at a White House news conference, referring to a deadline he set for Iran to reopen the Strait of Hormuz.

Trump said the Tuesday deadline is final, adding that Iran`s proposal was "significant" but "not good enough": "They made a proposal, and it`s a significant proposal. It’s a significant step. It`s not good enough. It could end very quickly, the war, if they do what they have to do. They know that".

He warned Tehran would face consequences. "I am very upset. They are going to pay a big price for that… Iran still retains some missiles and drones. They got a lucky shot… If I had my choice, I would take the oil. Unfortunately, the American people want to see us come home. We could leave right now, but I want to finish it up. Hopefully, it will be over with quickly".