
The United Nations says up to 50 people have been killed in missile attacks on schools and hospitals in the region.
Turkey’s foreign ministry blames Russia for the attacks but Moscow is yet to respond to the allegations.
Meanwhile, Syrian President, Bashar Al-Assad, has cast doubt over plans to implement a “cessation of hostilities” in Syria.
Last week world powers agreed to work towards a selective truce in Syria, to begin later this week.
But in his first comments on the announcement, President Assad says such a ceasefire does not mean all the parties will put down their weapons.