Russian President Vladimir Putin and Iranian President Hassan Rouhani met in China on Saturday during a weekend summit of the Chinese- and Russian-led security bloc. Rouhani spoke highly of the Russian stand during negotiations over the nuclear deal, from which the US withdrew in May this year, calling the Russian role "important and constructive." He added that he would like to further discuss the "illegal American withdrawal" from the agreement.Putin described Russian-Iranian cooperation in Syria as "successful," the Arabic service of the Sputnik news agency reported. The Sputnik English service reported that pockets of ISIS fighters still operate in Syria "only in areas controlled by the US," according to Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov, who delivered the statement on Saturday. Syrian rebel groups claim that Iranian and Hezbollah fighters returned to the Israeli-Syrian border wearing the uniforms of the Assad forces to avoid Israeli attacks, reported the Washington Post on Saturday. The weekend summit was organized by the Shanghai Cooperation Organization (SCO) and held in the port city of Qingdao.