TEHRAN, Dec. 18 (Xinhua) -- Iranian Foreign Minister Mohammad Javad Zarif will leave Tehran to Geneva on Tuesday to attend a meeting on the formation of a Syrian constitutional committee, Iran's Foreign Ministry announced.
The United Nations Special Envoy for Syria Staffan de Mistura will host a joint meeting in Geneva with the high-level representatives from Iran, Russia and Turkey.
A source with the UN envoy's office said the efforts to establish a "credible, balanced and inclusive constitutional committee" have been the subject of continuing consultations.
The formation of the constitutional committee was agreed upon in January during inter-Syrian talks, brokered by Russia, Iran and Turkey, in Russia's Sochi.
The committee is expected to have 150 members from both the Syrian government and the opposition.
On Dec. 20, the UN envoy will address the Security Council in New York for the last time before he steps down on the last day of this year.