The UN Security Council has been told that increasingly alarming accounts of hunger-related deaths are emerging from the Tigray region of Ethiopia.
The UN secretary general, Antonio Guterres, said life-saving humanitarian efforts were being crippled.
He again appealed to the Ethiopian government to allow the unhindered movement of desperately needed supplies to the region, after nearly a year of conflict.
Mr Guterres described Ethiopia’s decision last week to expel seven UN officials as disturbing and unprecedented.
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Ethiopia’s envoy said his government was under no legal obligation to explain its actions.
With BBC