ISIS has renewed its counter offensive by the eastern banks of the Euphrates River through its remaining suicide attackers.
The latest round of bombings has left 34 ISIS members and Syrian Democratic Forces (SDF) fighters dead.
The Syrian Observatory for Human Rights documented the death of 19 ISIS terrorists and four more suicide bombers. At least 11 SDF fighters were killed in the attacks.
The latest figures bring the total ISIS casualties killed in air strikes and fighting to 1,273, while the SDF lost 669 members since September 10.
The Observatory documented 401 civilian deaths, including 144 children and 86 women from Syria. They were killed in bombardment of an ISIS pocket.
In addition, the Observatory monitored the entry of 35 truck transporting people from ISIS-held regions to safety. Even more trucks are expected in the future given US-led coalition strikes on the area.
It noted that bombardment overnight Saturday was the fiercest in some two weeks.
It also said that since December, some 30,600 people had fled ISIS pockets.
The terrorist group has meanwhile executed more than 713 captives, who were arrested on various charges, added the Observatory.