Human Rights Watch expresses concern over the safety of civilians, urging both sides to avoid putting civilians in danger.
Leader of Tigray rebels denies damaging airport at Axum, northwest of the main city, Mekelle, saying only obstacles were placed to block the Ethiopian army's advance.
Ethiopia's army says it plans to surround capital of Tigray region with tanks and may use artillery, but TPLF rebels say they are digging trenches and standing firm against "waves" of soldiers.
PM Abiy Ahmed's government rebuffs African Union effort to arbitrate, saying its troops are drawing close to TPLF-held capital of northern Tigray region.
There was no immediate comment from Ethiopia’s government, which has been fighting the Tigray regional forces since a November 4 attack on a military base there.
Tigrayan leaders say they will not surrender to Abiy administration as United Nations appeals for an immediate end to clashes in Tigray region that has forced 30,000 people to flee to Sudan.
The war in Ethiopia can still be stopped before it gets out of control and potentially draws in Eritrea.
Ethiopian PM Abiy Ahmed is being pressed behind the scenes to allow mediation on Tigray conflict that has spilled into neighbouring Eritrea and rocked wider Horn of Africa, diplomats say.
Number of Ethiopian refugees fleeing violence in the northern Tigray region has reached 24,944, Sudan's SUNA news agency reports.
At least two of the rockets hit the Asmara airport, three diplomats said, hours after the Tigray regional government warned it might attack.
The UN human rights chief Michelle Bachelet expresses "increasing alarm" at violence in Ethiopia's Tigray region and says an alleged massacre there might amount to war crimes.
Amnesty International says scores, and likely hundreds, of people are stabbed or hacked to death in Mai-Kadra town in the south-west Zone of Ethiopia's Tigray Region.
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