Ethiopia’s prime minister has given forces in the northern region of Tigray 72 hours to surrender as government troops advance on the capital, Mekelle.

Abiy Ahmed told Tigrayan leaders they were “at a point of no return”.

The Tigray People’s Liberation Front (TPLF), which controls the mountainous region, has vowed to keep fighting.

The conflict has reportedly killed hundreds and displaced thousands in recent weeks. The UN has warned it could trigger a humanitarian crisis.