The UN has suspended all aid convoys in Syria after its lorries were attacked by warplanes near Aleppo on Monday, the BBC reports.
The convoy had received proper permits, and all warring parties – including Russia and the US – had been notified, a UN spokesman said.
Eighteen of the 31 lorries, containing wheat, winter clothes and medical supplies, were destroyed.
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.
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.