Damaged aid trucks are pictured after an airstrike on the rebel held Urm al-Kubra town

Damaged aid trucks are pictured after an airstrike on the rebel held Urm al-Kubra town

Damaged aid trucks are pictured after an airstrike on the rebel held Urm al-Kubra town, western Aleppo city, Syria September 20, 2016. REUTERS/Ammar Abdullah

Russia-Syria refuse accusation of targeting UN aid convoy