Delivery of supplies is first move since world powers agreed on an ambitious plan to cease hostilities

Trucks carrying aid entered four besieged towns in Syria on Wednesday, in what the United Nations described as a test for the country's warring sides ahead of a hoped-for cease-fire.

The Red Crescent said trucks laden with supplies entered Moadimayet al-Sham, near Damascus, the first delivery of aid since world powers agreed on an ambitious plan to cease hostilities by Friday and dramatically ramp up humanitarian access.