About 18 people, including 10 kids and three women, were killed overnight in the city of Talbiseh, the UK-based watchdog group said.
It said that the toll is likely to escalate due to the critical condition of the injured, Xinhua reported.
Meanwhile, six men and a child were also killed late Saturday night during the shelling in the suburbs of al-Waer.
It said the Syrian air force has carried out 533 air strikes on several cities in recent days.
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