Russia and Turkey reached a deal to set up a buffer zone running 15-20 km deep into rebel territory ISTANBUL: There has been some withdrawal of militants from the demilitarization zone in Idlib following the Russia-Turkey deal on the northwestern Syrian region, the US special representative for Syria engagement told reporters in Ankara. The two countries reached a deal to set up a buffer zone running 15-20 km (9-13 miles) deep into rebel territory and evacuated of all heavy weapons and all militants by Monday. Hayat Tahrir Al-Sham (HTS), a militant alliance spearheaded by Al-Qaeda’s former Syrian affiliate, is the most powerful militant alliance in Idlib. “The withdrawal of heavy weapons is complete by all accounts,” James Jeffrey said. “There is some question as to whether everybody from (Hayat Tahrir Al-Sham) has left.”