Seven of those killed in regime and Russian strikes in Sarmeen town of Idlib province were all members of one family, Syrian Observatory for Human Rights says.
Renewed violence tightened the noose around Syria's last major rebel-held bastion and deepened an already dire humanitarian crisis.
Residents of villages and towns in southern parts of Idlib province have been fleeing while regime forces have been pushing into the northwestern province of Idlib toward a rebel-held town, Maaret al Numan.
Syrian regime forces have seized dozens of towns and villages in northwest Syria, killing nine civilians who were trying to escape the flashpoint area, the Britain-based Syrian Observatory for Human Rights said.
War monitor SOHR says regime push "is an attempt to get closer to Maaret al Numan" in Idlib province which Russia and regime have intensely bombed fuelling exodus of Syrians, many of whom Turkey's President Erdogan says are marching towards Turkey.
The body of former MI6 officer Le Mesurier, 48, was found dead in the street in Beyoglu district of Istanbul in the early hours of Monday by passersby who were going to the mosque for the morning prayer.
Anadolu Agency says James Le Mesurier's body was found near his home in the Turkish city's Beyoglu district by worshippers on their way to a mosque to pray.
More than 20 civilians killed in attacks by the Syrian regime, its allies on de-escalation zone in Idlib over past week.
At least six people were killed and many others wounded during the artillery attack in Al Janoudiyah town, White Helmets added.
The air strikes and artillery shelling targeted the village of Basqala and nearby places, according to the Syrian Civil Defence rescue group, also known as White Helmets.
Even though he was just in his 20s, the young Syrian captured images of the aftermath of atrocities committed by the regime and Russian forces until he died in the line of duty.
Anas al Dyab, a photographer and videographer in his early 20s, was a member of the White Helmets who also contributed to Turkey's Anadolu Agency.
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