Indirect talks in Geneva show progress, but gaps remain over Iran's uranium enrichment and missile programme.

Majid Takht-Ravanchi, Iran's deputy foreign minister, tells the BBC's Lyse Doucet that the ball was "in America's court to prove that they want to do a deal".

Iran is pursuing a nuclear agreement with the U.S. that delivers economic benefits for both sides, an Iranian diplomat was reported as saying on Sunday.