Seven civilians were killed in airstrikes carried out by regime forces and Russia in northern Syria's de-escalation zones, according to the White Helmets civil defense agency on Saturday.
The attacks targeted the city of Maarat Al-Numan and the town of Al-Naqeer and Al-Bara in Idlib province as well as Kafr Zita and Al-Ltamenah towns in Hama province.
White Helmets said three civilians were killed in Maarat Al-Numan and four in Al-Bara while a total of 15 people were injured.
Turkey and Russia agreed last September to turn Idlib into a de-escalation zone in which acts of aggression would be expressly prohibited.
The Syrian regime, however, has consistently broken the terms of the ceasefire, launching frequent attacks inside the de-escalation zone.
Syria has only just begun to emerge from a devastating conflict that began in early 2011 when the Bashar al-Assad regime cracked down on demonstrators with unexpected severity.