Four civilians were killed in airstrikes by Bashar al-Assad regime forces and Russia on de-escalation zones in northern Syria on Sunday, according to the White Helmets civil defense agency, Anadolu reports.
An airstrike targeted the town of Khan Shaykhun in the Idlib province, leaving two civilians dead, the White Helmets said.
One civilian was also killed in another airstrike in the village of Fleife, and another in the village of Sheikh Dames, it said.
According to the Syrian opposition, the attack on Khan Shaykhun was carried out by a Russian warplane that took off from the Khmeimim airbase in Latakia.
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.