The nine-month civil war centred on Ethiopia's Tigray region has killed thousands and displaced more than one million people, with the US government's aid agency estimating almost a million face imminent starvation.
Ethiopian ethnic separatist rebels have looted warehouses full of US-provided food aid meant for starving people in across the north.
The US Agency for International Development (USAID) said on Tuesday the Tigray People's Liberation Front (TPLF) had raided its warehouses in the Amhara region over the past three weeks.
After regaining control of the Tigray region from the Ethiopian army in July, the TPLF invaded the neighbouring Amhara and Afar regions, displacing hundreds of thousands of residents.
