Ankur Desai

Mr. Vance has been speaking to Fox News, but insists certain conditions must be met.

I heard more from our North America correspondent, Peter Bowes, who's in LA.

He said the ball was very much in Iran's court.

He also addressed some issues that we didn't hear about when the talks broke up in the early hours of Sunday over the weekend, namely the status of the Strait of Hormuz.

In fact, Mr Vance went as far as to accuse Tehran of moving the goalposts during the meeting, saying that he'd expected the Iranians to fully reopen the strait in return for a ceasefire.

He said by blocking traffic, Iran was engaging in an act of economic terrorism.

And were that to continue, he said, the U.S.

would abide by the same principle that no Iranian ships will get out either.

He said two could play at that game.

And as we know, and as you've been reporting, the U.S.

blockade of Iran's ports is now in effect.

Donald Trump has said more ships are getting through.

But this issue remains the most sensitive, at least I think for the next coming days.

Because as long as global trade is being hampered in the way that it has been in recent weeks, it seems highly unlikely that any of the other big issues are going to be resolved.

Peter also seemed to allude that they talked over a number of things in Islamabad over the weekend with Iran, seemed to give an indication of what some of those topics would have been.

Yes, he did.

He elaborated a little bit more on these core issues that are dividing the two countries.

He said the US had to put a lot on the table and he said it had done that.

Tehran, he said, wasn't responding in the way that he and the president wanted.

On the table, he said, was the ceasefire and the promise that Iran could one day be treated like a normal country.