ASTANA (Reuters) - Russia, Turkey and Iran signed on Thursday 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.

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.