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Fighting between Ethiopia's central government and forces in Tigray has been going on for almost three weeks. The United Nations has expressed concern about possible war crimes after a threat by the Ethiopian army to start an assault on the northern Tigray region's capital. A deadline set by the government for fighters in the region to surrender is due to expire on Wednesday. Awol Allo is a senior lecturer at Keele University with expertise on Ethiopia.

(Picture: Ethiopians who've fled war in the Tigray region. Credit: REUTERS/Mohamed Nureldin Abdallah)