Russian Foreign Minister Sergei Lavrov declared that he had optimistic outlook on the successful outcome of talks between P5+1 mediators and Tehran on a comprehensive nuclear deal with Iran before the June 30 deadline, Sputnik News reports.
"All our estimates remain valid, chances are there, and they are high," Lavrov told.
However Lavrov also noted that the outcome would largely depend on approaches taken by other participants in the negotiations.