Bombardment killed 13 civilians in north-west Syria on Sunday (April 7th), the large majority in regime fire in the Idlib region, which is under the control of Tahrir al-Sham, AFP reported.
Sunday's shelling and rocket fire by regime forces killed nine civilians in several areas of Idlib, the Syrian Observatory for Human Rights said.
They included five people in the town of Nayrab, three in Saraqeb, and one in the village of al-Khuwayn, the Observatory said.
Bombardment by Islamist fighters on the regime-held town of Masyaf in the adjacent province of Hama killed four civilians, the Observatory added.
More than 30 civilians have been killed in regime bombardment on Idlib since Wednesday alone, according to the Observatory.
Syrian Foreign Minister Walid Muallem this week said his government was growing impatient to recapture Idlib, the last region outside its control apart from the Kurdish-held north-east.
The UN Office for the Co-ordination of Humanitarian Affairs (OCHA) has said the escalating violence had already killed 90 civilians in the Idlib region in March, nearly half of them children.
The escalation pushed more than 86,500 people to flee their homes in February and March, it added.