Air strikes killed at least 18 people, including seven children, in rebel held Idlib region in north western Syria on Sunday, the Syrian Observatory for Human Rights reported.
The northwest is the last major foothold of the rebellion against President Bashar al-Assad, who has vowed to recover the whole country but has made little or no gains in more than two months of military operations in the area.
State media also said that a train carrying phosphate in central Syria was derailed by a bomb blast east of Palmyra, causing injuries among the crew. It did not identify the perpetrators. Islamic State is still active in that area.
In the northwest, the Observatory said Syrian government air strikes killed 12 people, including five children, in the village of Urum al-Jawz in western Idlib province. Four more people, including two children, were killed in strikes on Kfarouma in the south of the province.