In search for accomplices, anti-terror investigators establish that Abdullah Anzorov spoke with Russian-speaker from Idlib, telling him he'd 'avenged the Prophet' after beheading

US authorities charge Mohamad Yassin Alcharihi with undervaluing 18-foot piece dating from Roman Empire, seemingly looted from Idlib area, in order to avoid import duties

Ankara announces move after weekend strikes that killed dozens of Turkish, Syrian fighters, amid regime onslaught in Idlib that has displaced almost a million people

Ankara says it wants no 'face-off' with Moscow as tensions spiral in Idlib, claims it might receive Patriot defense system, despite earlier purchase of Russian S-400 platform

Fresh offensive risks becoming full-blown conflict between Turkey and Assad's forces, shattering cooperation between Ankara and Moscow

State TV says helicopter was hit by a 'hostile missile' in Aleppo countryside; Turkish-backed rebels claim responsibility

5 wounded in latest fighting between two militaries vying for control of Idlib province areas in northwestern Syria

Recapture of Saraqeb comes as Assad regime pushes to retake the last rebel-held province of Idlib; Turkey sending more troops to the area

Weeks of intensive aerial bombardment and a bruising ground offensive have emptied towns in the region, sending hundreds of thousands fleeing their homes

Troops trade fire after Turkish convey of hundreds of vehicles enters northwest Syria, monitor group says; another 14 civilians said killed in Russian airstrike