World Bulletin / News Desk
Efforts to negotiate a nuclear deal have been dragged into a 14th day with no end in sight, as Iran has accused the West of back-tracking and Washington threatening to walk away.
A deadline for Friday morning to present adeal to the US Congress was missed, effectively doubling the time for American lawmakers to review the accord - if it can be reached - to 60 days and risking delaying key measures such as the lifting of sanctions.
"We're making progress, it's painfully slow... there are still some issues that have to be resolved," said British Foreign Secretary Philip Hammond, after meeting with other ministers.
Al Jazeera report that Hammond had hoped that over the next 12 hours experts working behind the scenes "will clear some more of the text and then we can re-group tomorrow to see if we can get over the last hurdles."
World powers - Britain, China, France, Germany, Russia and the United States -- are still negotiating for an accord to end a 13-year standoff and finalise a deal to put nuclear arms out of Iran's reach in return for lifting biting international sanctions.