A damaged wall of a school is pictured in rebel-held Ain Tarma, eastern Damascus suburb of Ghouta, Syria September 17, 2016. Picture taken September 17, 2016. REUTERS/Bassam Khabieh

A damaged wall of a school is pictured in rebel-held Ain Tarma, eastern Damascus suburb of Ghouta, Syria September 17, 2016. Picture taken September 17, 2016. REUTERS/Bassam Khabieh

A damaged wall of a school is pictured in rebel-held Ain Tarma, eastern Damascus suburb of Ghouta, Syria September 17, 2016. Picture taken September 17, 2016. REUTERS/Bassam Khabieh

September 18, 2016 4:06 PM (UTC+8)