The UN has suspended all aid convoys in Syria after its lorries were attacked by warplanes near Aleppo yesterday. The convoy had received proper permits, and all warring parties – including Russia and the US – had been notified. A UN spokesman said 18 of the 31 lorries, containing wheat, winter clothes and medical supplies, were destroyed. <br/><br/>A senior local official of the Syrian Arab Red Crescent was among a number of civilians killed. The President of the International Committee of the Red Cross, Peter Maurer, has described the attack as a flagrant violation of international humanitarian law.<br/><br/>The US has expressed outrage over the attack, which took place in the town of Urum al-Kubra hours after the Syrian army declared a US-Russian brokered truce over. Washington has said, it will reassess the future prospects for co-operation with Russia – an ally of Syria's government. Aid deliveries to besieged areas had been a key part of the cessation of hostilities deal brokered last week.