The BBC's Lyse Doucet
Media playback is unsupported on your device
Video

Iran nuclear crisis: Talks set to be 'long and difficult'

A fresh round of talks about Iran's nuclear ambitions have started in Kazakhstan where Iranian officials have said they have a right to enrich uranium.

Negotiators from countries including China, Russia and the US are in Almaty for the discussions, which the BBC's Lyse Doucet says are set to be "long and difficult".