Clashes between Tigrayan forces and their allies and Ethiopia’s federal troops broke out on Wednesday, prompting fears of a return to a full scale civil war and reports of panic buying.

A humanitarian source in the neighbouring region of Afar told the AFP news agency there was “heavy fighting overnight”, including drone strikes, around the town of Abala in the mountains between Afar and Tigray, as “federal forces pushed the rebels from entering the town”.

There have also been reports of fighting near the town of Lalibela in the Amhara region, which is home to churches hewn out of rock, recognised as a UN World Heritage site. The US has warned against travel to all three regions.

During the two-year conflict which ended in 2022, Tigray was totally cut off from the outside world.

Limited access to cash, food and medicine pushed hundreds of thousands into famine-like conditions.

It was one of the most deadly conflicts this century – with estimates that some 600,000 people died as the fighting drove the region to the precipice of famine.

On Sunday, the TPLF announced an alliance with six other armed groups to oust the government.

On Wednesday, its forces seized control of three airports from federal police.

Following the seizure of the airports, Ethiopian Airlines has cancelled all flights to Tigray.

Additional reporting by Peter Mwai, BBC Verify