As an "immediate security measure, other convoy movements in Syria have been suspended," Jens Laerke, spokesman for the UN humanitarian agency told reporters in Geneva.
Red Cross spokesman Benoit Carpentier said the director of the Syrian Red Crescent's sub-branch was among those killed in the attack.
Hours after the expiration of the Syrian truce, the UN said one of its convoys carrying aid to the civilians trapped under militant control in Aleppo was hit by an airstrike near the city. The world body said the airstrike destroyed at least 18 of the 31 trucks. It was not immediately clear who was responsible for the strike.
A Syrian opposition group claimed the attack had killed 12 Red Crescent volunteers and drivers, according to Press TV.
The United Nations (UN)’s special envoy to Syria, Staffan de Mistura, reacted by saying, “Our outrage at this attack is enormous... the convoy was the outcome of a long process of permission and preparations to assist isolated civilians.”
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