At least 23 people were killed in the eastern Syrian city of Deir Ezzor Tuesday, including nine children when a school was shelled by the "Islamic State" (ISIS) terrorist group, a monitor said, according to AFP.

At least 24 more people died in air raids or fighting outside the capital, in the Latakia province bastion of President Bashar al-Assad and in Aleppo province, the Syrian Observatory for Human Rights added.