US says 'grave' consequences if Syria's al-Qaida dominates Idlib province
Idlib province, the only Syrian province that is entirely under rebel control, has been a major target of Russian and Syrian aerial strikes that caused hundreds of civilians casualties.
Follow us on GoogleSyrian Civil Defence members wear gas masks near the site of what activists said was a chlorine gas attack in the Idlib countryside [File](photo credit: REUTERS)ByREUTERS