Turkey, Iran and Russia on Thursday signed an agreement calling for the setting up of four "de-escalation zones" in war-torn Syria — the latest attempt to reduce violence in the Arab country — and said that President Bashar Assad's air force would halt flights over the designated areas in the country's north, center and south.
But as officials from the three countries that back rival sides in the conflict signed the agreement at the Syria cease-fire talks in Kazakhstan, some members of the Syrian opposition delegation shouted in protest and walked out of the conference room in Astana, the Kazakh capital.
The opposition is protesting Iran's participation at the conference and role as a guarantor of the agreement, accusing it of being a party in the war that has killed some 400,000 people and displaced half the country's population.
"Iran is a country that is killing the Syrian people and the killer cannot be the rescuer," said Abu Osama Golani, a rebel commander who attended the gathering in Astana.
Read more: Russia, Iran, Turkey sign on 'de-escalation zones' in Syria - ABC News