Foreign ministers from six world powers continue their intense talks with Iran in Geneva on Saturday.

They're hoping to clinch a long-sought deal to restrain Iran's disputed nuclear program.

French Foreign Minister Laurent Fabius warned of serious stumbling blocks, as the high-stakes negotiations entered their third day.

(SOUNDBITE) (French) (AUDIO AS INCOMING) FRENCH FOREIGN MINISTER LAURENT FABIUS SAYING:

"I hope there will be an agreement, but at this stage there are still important points to deal with."

His British counterpart, William Hague:

(SOUNDBITE) (English) BRITISH FOREIGN SECRETARY WILLIAM HAGUE SAYING:

"These negotiations have made very good progress and continue to make good progress. I think it is fair to say. But there are still important issues to resolve, so clearly they are not over yet, we are going to have to give a lot of time and attention to these issues during t during the course of today and there is no fixed time for