Formation of a constitutional committee is key to political reforms and new elections meant to unify Syria and end an eight-year war, which has killed hundreds of thousands of people and displaced about half of Syria's pre-war 22 million population.
UNRWA, the UN agency that cares for Palestinians, said on Sunday that conditions in Yarmouk were hellish. "There must be safe passage for the sick and the wounded and the dying civilians," said Chris Gunness, the UNRWA spokesman.
Syria airstrikes HIGHLIGHTS: During the meeting of the Security Council, UN Secretary General urged all member states to show restraint and avoid any acts that could escalate matters and worsen the suffering of the Syrians.
"Regarding our joint operation to fight terrorists in Syria, this military operation is indeed coming to an end,'' Putin told Assad in televised remarks. "I'm pleased to see your willingness to work with everyone who wants peace and settlement.''
Iranian media have often carried video and pictures of Soleimani, who commands the Quds Force, the branch of the Revolutionary Guards responsible for operations outside Iran, at frontline positions in battles against Islamic State in Iraq and Syria.
US President Donald Trump's decision to shut down the CIA programme of support meanwhile played to Bashar al-Assad's advantage and came as a blow to the opposition. Rebel sources say the programme will be phased out towards the end of the year.