Nearly 2,000 tons of food aid was stolen in Darfur in western Sudan.
The attack was carried out by an armed group on Tuesday evening in the east of Al-Facher, the capital of north Darfur.
Last week, UN Secretary General Antonio Guterres condemned the "looting and violence" near a former UN logistics base in Al-Facher handed over to local authorities earlier this month.
Following the attack, on Wednesday the authorities in Sudan's North Darfur state announced a night curfew.
According to an official, in Sudan one in three people depend on humanitarian aid.