Three children were killed in Russian air strikes on Thursday in the northern Syrian city of Aleppo.
Russian jets struck a residential area in Endan town of Aleppo, killing three children and injuring 10 other civilians, according to civil defence sources.
The sources said that rescuers were struggling to search for survivors under the debris of destroyed buildings in the town.
More than 1,730 civilians have been killed in Syria since Russia launched air strikes against opposition forces in September, according to a report by Syria's main opposition bloc, the Syrian National Coalition (SNC).
Syria has remained locked in a vicious civil war since early 2011 when the regime of Bashar al Assad cracked down on pro-democracy protests with unexpected ferocity.
Since then, more than 250,000 people have been killed and more than 10 million displaced, according to figures released by the UN.