Evidence mounts that Eritrean forces are in Ethiopia

FIRST COME muffled sobs, gradually growing louder with each new voice that joins the chorus. A woman in a black shawl begins to wail, her body rocking towards the portrait of a smiling young man in the middle of the room. Abraham was 35 years old when he was shot, says an older brother who is hosting mourning relatives on the outskirts of Addis Ababa, the Ethiopian capital. Last month armed men arrived at the family home in Adwa, a town in the northern region of Tigray. By then many of the town’s residents had fled, but not Abraham, who had a young child and a sick, ageing father. When the gunmen tried to steal two of the family’s trucks, Abraham resisted. He was shot dead on the spot, in front of his father.

According to his family, Abraham’s killers were from Eritrea, a neighbouring country whose troops have been fighting alongside Ethiopian government forces against the recently-ousted rulers of Tigray. There is little reason to doubt their claim. Although phone lines to Adwa have been cut since the fighting started in early November, they know what happened to Abraham from a family friend who met his father, as well as neighbours who escaped to Mekelle, the regional capital.

Abiy Ahmed, Ethiopia’s prime minister, has consistently denied enlisting the help of soldiers from Eritrea, the gulag state next door. But Abiy...