A vest of the Syrian Arab Red Crescent hanging on a damaged vehicle, in Aleppo, Syria on Tuesday. Pic/AP

Geneva: The UN said yesterday it had suspended all humanitarian aid convoys in Syria after a deadly air raid hit 18 of the 31 trucks delivering aid near Aleppo, killing 12 Red Crescent staff members. The attack took place hours after the Syrian military declared an end to a week-long ceasefire, with an outraged UN warning it could amount to a war crime.