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Hello, welcome to NewsHour. It's coming to you live from the BBC World Service Studios in central London.

I'm Tim Fraggs.

And we're beginning with the latest switch in tone from talk of a ceasefire extension of an interim deal to ease a trading chokehold,

from talk of that to rather more fighting talk. Iran's military leadership has warned that it retains the right to hit back

against what it says have been gross violations of the ceasefire by the Americans.

And in the reported words of Iran's supreme leader,

that Gulf states will no longer be safe locations for U.S. bases.

All this follows the American military, renewing attacks in southern Iran.

We'll bring you views from one of those Gulf states and from a veteran U.S. Middle East insider in a moment.

But first, let's get a view from Iran.

Fouad Izzardi is Professor of International Relations at the University of Tehran, an institution

that's regarded as aligned with the regime.

He's been speaking to my BBC colleague Sarah Montague.

How confident is he that current efforts to agree a reopening of the Strait of Hormuz

will bear fruit?

I think so. I think so. It was open before.

It will be open once this US blockade is gone.

Right. So the oil price, which again today is bumping up at $100 a barrel, do you expect that to come down?

Yes. Once the state is open, you will see that would come down. And in fact, Iranians would encourage more passage through this rate because they're going to level a fee at passing ships.

And the more ships pass, the more money Iran will make.

Okay. So that system of payments will remain?

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