Syria war: 'Russian air strikes kill dozens' in Idlib

Russian air strikes in northern Syria have killed more than 50 Turkish-backed militia fighters in the mainly rebel-held province of Idlib, reports say.

Many others were wounded in the attack, which marks an escalation of violence in the region.

A training base for an Islamist group called Faylaq al-Sham was hit.

The assault puts at risk a ceasefire in Idlib, brokered and monitored by Russia and Turkey, which back opposite sides in the war.

UK-based monitoring group the Syrian Observatory for Human Rights put the number of dead at 78.