World powers are strongly considering delaying a Sunday deadline to reach a deal on Iran's nuclear programme until November, Russian media reported, citing Moscow's negotiator at the Vienna talks.
"The dominant point of view is that we need a new control date in November. That is, a year from reaching the Geneva agreement," RIA Novosti quoted Deputy Foreign Minister Sergei Ryabkov as saying on Friday.
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Iran and the six powers known as the 5+1 group -- the United States, France, Britain, Russia, China and Germany -- have been holding negotiations over Tehran's controversial nuclear programme.
Washington and Iran earlier this week laid the groundwork for pushing back a July 20 deadline agreed at an interim deal in Geneva last November after days of intense talks failed to produce a breakthrough.
"The round is not over, there are several substantial issues that continue to be discussed. Russia's delegation, like other '5+1' delegations, remain in Vienna until reaching an agreement," Ryabkov was quoted as saying.