Government forces, backed by Russian air power, have waged a major assault to capture the northwest province of Idlib, part of the last remaining territory held by rebels backed by Turkey
Though the Trump administration is yet to announce the death of Baghdadi, media has reported that he was killed in the operation conducted by US Army's elite Delta Force
The Turkish defence ministry hailed its forces' capture of the first Kurdish-held town of the offensive so far
Syrian President Bashar al-Assad faced worldwide criticism for an alleged chemical attack involving chlorine gas on April 7 in the suburb of Douma