Iran and US talks upbeat despite disagreement over uranium enrichment

Talks described as positive by US but Iran will not back down from its right' to enrich uranium for energy

Iran and the US have ended a fourth round of talks on a surprisingly upbeat note, despite the two sides appearing far apart on the central issue of a uranium enrichment programme on Iranian soil.

The talks in Muscat, Oman lasted four hours and were described as positive by the US side. The Iranian foreign ministry said the talks had been difficult but detailed to better understand each side's positions".