Russia: Iran nuclear talks progress but could still unravel

MOSCOW - Russia said on Thursday that Iran and six global powers made progress in expert-level talks this week on the standoff over Tehran's nuclear program but there was no breakthrough and that backsliding remained a danger.
"This progress is real but it is not sufficient to speak of a definitive shift," Deputy Foreign Minister Sergei Ryabkov, Russia's chief negotiator on the issue, said of the talks in Istanbul on Monday.
"We cannot say this progress is irreversible. This alarms us a little, but from round to round, we have a more and more businesslike discussion of all the issues," he told reporters.