Hello and welcome to NewsHour from the BBC World Service.
Coming to you live from London, I'm Celia Hatton.
We're starting this edition of NewsHour in Geneva,
where a team from Iran has been meeting with European foreign ministers.
Their talks lasted several hours and they marked the first face-to-face dialogue between Tehran and Western governments
since Israel first attacked Iran a week ago.
Iran's Foreign Minister Abbas Araqchi is meeting his counterparts from the UK,
the European Union, France and Germany.
The talks have been billed as negotiations by some, including the US President Donald Trump.
But others are describing the meeting as a clear chance to deliver a message to Iran.
In the last couple of hours, Britain's Foreign Minister David Lamy spoke to reporters in Geneva.
We were clear Iran cannot have a nuclear weapon.
We are keen to continue ongoing discussions and negotiations with Iran and we urge Iran to continue their talks with the United States.
This is a perilous moment and it is hugely important that we don't see regional escalation of this conflict.
At the same time today, the UN Security Council has been discussing the Israel-Iran conflict.
The UN Secretary General Antonio Guterres had this to say.
There are moments when the choices before us are not just consequential, they are defining.
Moments when the direction taken will shape not only the fate of nations,
but potentially our collective future.
This is such a moment.