Russia, Turkey and Iran today signed a memorandum on creating safe zones in Syria, while the delegation of the armed Syrian opposition walked out and shouted angrily after a new round of peace talks held in the Kazakh capital Astana. <br/><br/>Russia, Turkey and Iran act as guarantors of the Astana peace process. Kazakh Foreign Minister Kairat Abdrakhmanov said that next Syria peace talks would be held in Astana in mid-July.