The statement came following the 13th international meeting on Syria in the Kazakh capital of Nur-Sultan on Friday, according to TASS.
"[Russia, Iran and Turkey] held detailed consultations in the trilateral format as well as with the representatives of the Office of the United Nations Secretary General’s Special Envoy [for Syria] Geir O. Pedersen on the conclusion of formation and launching of the Syrian Constitutional Committee in Geneva, in accordance with the decisions of the Syrian National Dialogue Congress in Sochi. They expressed satisfaction with the progress made on finalizing the composition and the rules of procedure of the body and reiterated their readiness to facilitate the convening of the committee as soon as possible," the document reads.
The Astana peace process guarantors have also hashed over the issue of holding an international conference on the humanitarian aid for Syria, according to the joint statement.
"In order to maintain the improvement of the humanitarian situation in Syria and the progress in the process of the political settlement, they called upon the international community, the United Nations and its humanitarian agencies, to enhance the assistance to Syria, including by developing early recovery projects, the restoration of basic infrastructure assets – water and power supply facilities, schools and hospitals," the document read.
According to the statement, the parties "reviewed in detail the situation in the Idlib de-escalation area and highlighted the necessity to establish calm on the ground by fully implementing all agreements on Idlib, first and foremost the memorandum of September 17, 2018."
"They expressed serious concern over the increased presence of the terrorist organization 'Hayat Tahrir al-Sham' in the area and reaffirmed the determination to continue cooperation in order to ultimately eliminate Daesh, Al-Nusra Front and all other individuals, groups, undertakings and entities associated with Al-Qaeda or Daesh, and other terrorist groups, as designated by the UN Security Council," the statement read.
"While deploring civilian casualties, they agreed to undertake concrete measures, based on the previous agreements, to ensure the protection of the civilian population in accordance with the international humanitarian law as well as the safety and security of the military personnel of the guarantors present within and outside the Idlib de-escalation area," the document added.
The Russian Defense Ministry said earlier that terrorists continued to shell the Idlib de-escalation zone. The shelling has already claimed the lives of 110 Syrian government troops and 65 civilians, leaving over 240 Syrian military and 100 civilians wounded.
The 13th international high-level meeting on Syria was held in Nur-Sultan on August 1-2. The guarantors, the Syrian government and the armed opposition sent their delegation to Kazakhstan. The UN and Jordan were invited to the talks as observers, as well as Iraq and Lebanon that took part in the Astana peace process for the first time.