Syrian opposition sources said Russian jets bombed rebel-held northwestern Syria on Sunday in the most extensive strikes since a Turkish-Russian deal halted major fighting with a ceasefire nearly six months ago.
Witnesses said the warplanes struck the western outskirts of Idlib city and that there was heavy artillery shelling in the mountainous Jabal al Zawya region in southern Idlib from nearby Syrian army outposts. There were no immediate reports of casualties.