CEOAFRICA learnt that the UK Foreign Secretary William Hague has urged negotiators to "seize the moment", as talks in Geneva over Iran's nuclear plan enter a third day.

According to source, Mr Hague hailed "good progress" but said there was still uncertainly about whether a deal could be reached.

Under a possible deal, Iran could freeze expansion of nuclear activity for limited sanctions relief.

UK, French and German foreign ministers have joined US Secretary of State John Kerry for the unscheduled talks.

Russian Foreign Minister Sergei Lavrov and the Chinese Foreign Minister Wang Yi are also expected to attend on Saturday.

Analyst said that talks about Iran's nuclear programme are moving fast for the first time in years.

Mr Hague said that momentum had built up in the negotiations and there was a very different atmosphere from that of just a few months ago.

"There is now a real concentration on these negotiations so we have to do everything we can to seize the moment and seize the opportunity to reach a deal that has eluded the world," he said.

But he added that it was too early to say whether the talks would reach a successful conclusion.

 "It's certainly not possible to say that we can be sure there will be a deal at the end of today," said William Hague.