The United Nations Children's Fund (Unicef) delivered nutritional and educational supplies to the besieged Syrian town of Daraya on June 1.
It was the first UN aid mission to the town in four years.
The trucks got through on the day when the Syrian government faced a deadline to admit aid by road or risk having air drops imposed by the countries of the International Syria Support Group (ISSG), which includes Syria's ally Russia.
The Unicef aid to Daraya contained nutrition items for children and pregnant and lactating women and educational supplies for 4,000 people.
The UN estimates 4,000 civilians are still in Daraya, which is close to a large air base and has been besieged and regularly bombed since 2012.