Two consecutive raids by Russian warplanes that targeted the town of Abu al-Duhur in the Idlib province left another 30 injured, Ahmed Mustafa told Anadolu Agency.

Syria has been locked in a vicious civil war since early 2011, when the Assad regime cracked down on pro-democracy protests -- which erupted as part of the "Arab Spring" uprisings -- with unexpected ferocity.

Since then, more than a quarter of a million people have been killed and more than 10 million displaced across the war-battered country, according to the UN.

Anadolu Agency