US President Donald Trump said he had secured guarantees from Iran that it would not develop nuclear weapons.
Trump has said his priorities for any deal include stopping Iran from any nuclear weapon development and re-opening the blockaded Strait of Hormuz.
"The one guarantee that I have to have is that there will be no nuclear weapons. They've agreed to that, and it was very interesting," he told his daughter-in-law Lara Trump in an interview broadcast on her Fox News program on Saturday night.
But Tehran has previously cast doubt on Trump's assertions and the parties appeared far apart on their key priorities.
Iran has said it requires the release of $12 billion in frozen assets before it moved to substantive talks on issues such as its nuclear program and called earlier Trump comments that its enriched uranium -- a precursor for nuclear weapons -- would be destroyed "baseless", according to Iranian media.
Tehran has also insisted that Lebanon must be included in any end to the war despite ongoing fighting.
After Trump and US officials earlier said they were on the brink of striking a deal, he struck a less urgent tone and hinted at renewed military action in the Fox interview.
"I'm in no hurry," he said. "Slowly but surely we're getting, I think, what we want and if we don't get what we want, we're going to end in a different way."
