Iran and US agree deal to end war as Trump says Strait of Hormuz will be reopened

Frank GardnerSecurity correspondent

The mild euphoria greeting the announcement of an end to the US-Iran war is likely to be followed by some anxious days ahead.

The good news is that both Iran and the US want an end to hostilities and both want a full resumption of trade flowing into and out of the Gulf.

But there are still a number of ways this deal could come unstuck.

First, there is Lebanon. The chief mediators, Pakistan, say the deal includes Lebanon, specifically that all fighting in the region must stop, including between Israel and Iran's ally in Lebanon: Hezbollah.

If that conflict flares up again, will Iran then target Israel and if so, will the US retaliate against Iran? Or will we see Washington leave Israel to fight that one on its own?

Then there is the nuclear question. The 60 days mandated in this ceasefire are not long in which to hammer out how much nuclear enrichment Iran will be allowed, in return for sanctions relief, and what happens - and when - to Iran’s existing stockpile of dangerously enriched uranium.

And then there is the Strait of Hormuz. Iran's view is that it "won" the war and now it wants recognition of its sovereignty over all or part of this narrow waterway. That is unacceptable to the Arab Gulf states who are pushing for a return to the unfettered traffic enjoyed by everyone before this war started on 28 February.