AKIPRESS.COM - UN Secretary General Ban Ki-moon has urged Russia and the US to push all warring sides in Syria to allow safe passage for desperately needed aid.

Lorries with a month's food supply for 40,000 people are stuck at the Turkish border, 48 hours into a ceasefire, BBC reports.

Getting aid to civilians in besieged areas like the rebel-held eastern half of the city of Aleppo is a priority.

But disagreements between warring sides and concerns about safety are delaying emergency deliveries, the UN says.

Criticism has also been levelled at President Bashar al-Assad's government for trying to control aid flows.

"It's crucially important [that] the necessary security arrangements" are made so the convoy can travel, Mr Ban said.

"I have been urging the Russian government to make sure that they exercise influence on the Syrian government, and also the American side to make sure that Syrian armed groups, they also fully co-operate."