An international medical charity, Medecins Sans Frontieres (MSF), says it has found what it describes as "alarming" levels of malnutrition in Ethiopia's Tigray region.
Tens of thousands of Tigrayans have been displaced during seven months of conflict between regional forces and the Ethiopian army.
MSF said a third of children screened in rural clinics are malnourished. It said aid was rarely extended beyond large towns.
Some families are eating just once a day, and often only bread.
The charity said the situation would probably worsen during the approaching rainy season as the war is preventing farmers from going to their fields.
Many have been driven off their land and have sought refuge in towns or across the border in Sudan.
Ethiopian federal forces and their allies, including Eritrean soldiers, have been accused of using aid as a weapon of war in Tigray.
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