STORY: More than 280 trucks have crossed the Turkish border into northwestern Syria since aid operations resumed on Feb. 9, three days after the quake, following a break caused by highway damage, Hadi - Regional Humanitarian Coordinator (RHC) for the Syria Crisis - told Reuters.

The northwest, which is controlled by opposition groups at war with Syrian President Bashar al-Assad and where 90 percent of the 4 million-plus population were already depending on aid to meet basic needs, was the worst hit in Syria.

The disaster killed more than 4,500 people there, according to the United Nations.