US President Donald Trump says the agreed deal with Iran is not final.

Speaking at the G7 summit in France, he adds that the US will "go back to dropping bombs" if he does not like the final agreement.

It comes as the US and Iran are set to meet in Switzerland on Friday to sign the deal - the details of which have not yet been released.

On Monday, President Trump said "the deal is all signed" and the full text will be published "pretty soon".

It will extend a ceasefire for another 60 days, during which the sides will negotiate details of a final agreement.

The Strait of Hormuz will re-open toll-free as part of the deal, Trump has said, and the US blockade of Iran's ports will come to an end.

Technical talks on Iran's nuclear programme are also expected to begin this week, US officials said.

But the agreement is not a peace deal, the BBC's international editor Jeremy Bowen explains. It defers the thorniest issues such as Iran's nuclear programme and the level of sanctions relief to future negotiations.

There are also questions over what exactly the deal means for the war between Israel and Hezbollah in Lebanon. Iran insists it must be part of the deal.

The US and Iran are scheduled to sign the deal in the Swiss resort of Bürgenstock on Friday.

(Source: BBC)