At least 17 of those killed in the attack on the village of Abu Hassan in the area of Deir al-Zor were children.
17 children were among 36 ISIS family members killed in Abu Husn village of Deir Ezzor province near the Iraqi border, the Syrian Observatory for Human Rights said. Remaining seven victims are yet to be identified. This has been the highest death toll since September.
It is the British exile group SOHR reporting the lethal attack on an IS-controlled area just off the border with Iraq on Saturday.