Ethiopia's human rights Commission says at least 600 civilians were killed in a massacre in the northern Tigray state earlier this month.
United Nations aid workers have warned that emergency relief supplies are running out in the Ethiopian region of Tigray after weeks of fighting there.
A spokesman for the UN humanitarian affairs agency, Saviano Abreu, said it had been blocked from sending staff or supplies.
The UN refugee agency says the number of people who've crossed into Sudan has climbed to 40,000.
The UN Security Council is due to hold its first meeting later on Tuesday to discuss the fighting in Tigray.
- Ethiopian News