PLEASE NOTE THIS EDIT CONTAINS MATERIAL WHICH WAS ORIGINALLY 4:3

Iran and six world powers may be edging towards a nuclear deal.

Their top diplomats, including U.S. Secretary of State John Kerry, were in Geneva on Friday to help clinch an interim agreement over Tehran's disputed nuclear activities.

The tone seemed hopeful but cautious.

(SOUNDBITE) (English) U.S. SECRETARY OF STATE JOHN KERRY SAYING:

"We hope to try to narrow those differences but I don't think anyone should mistake that there are some important gaps that have to be closed."

The deal would lift some of the economic sanctions against Iran if it takes verifiable steps to limit its nuclear program.

In Moscow, Russian Foreign Minister Sergei Lavrov seemed more optimistic that a roadmap could be reached.

(SOUNDBITE) (Russian) RUSSIAN FOREIGN MINISTER, SERGEI LAVROV, SAYING:

"The reports we are getting from Geneva give us that hope."

The spokesman for European Union