At least three civilians were killed on Monday, in an air attack by Assad regime forces in the de-escalation zone in Idlib, northwestern Syria, reports Anadolu Agency.
Seven others were also injured in the attacks targeting Binnis village, the White Helmets said.
Idlib falls within a de-escalation zone forged under an agreement between Turkey and Russia.
The area, lying along Turkey’s southern border, has been the subject of multiple cease-fire understandings, which have frequently been violated by the Assad regime and its allies.
The influx of displaced civilians has increased its population to about four million in recent years.
Syria has been locked in a vicious civil war since early 2011 when the regime cracked down on pro-democracy protests with unexpected ferocity.