Tehran, Feb 25, (IANS): The European Union's foreign policy chief has said a comprehensive agreement on Iran's nuclear programme will benefit all sides.

"A comprehensive agreement would be mutually beneficial for all sides," Federica Mogherini said at Chatham House, a think tank in London, Tuesday, Press TV reported Wednesday.

The EU official said that an Iran nuclear deal was "at hand" if the negotiating sides demonstrated political will.

"A good deal is at hand if the parties would keep cooperating as they did so far and if we have enough political will from all sides to agree on a good deal and sell it domestically," Mogherini said, adding, "We cannot miss this opportunity."

Representatives from Iran and the US started nuclear talks Sunday in the Swiss city of Geneva. They held three rounds of negotiations in an attempt to narrow their differences.

Speaking to reporters in Geneva Monday after the end of the talks, Zarif said negotiators from Iran and the P5 1 group of world powers -- Britain, France, China, Russia, the US plus Germany -- would resume their discussions in the Swiss city next week.

Iran and the six world powers have missed two deadlines so far to reach a nuclear agreement since an interim deal was sealed in November 2013. The two sides have set July 1 as the next deadline for reaching a final deal.