Tigrayan fighters deliberately killed civilians and gang-raped dozens of women and underage girls in two towns in Ethiopia’s Amhara region last year, Amnesty International said on Wednesday, the latest example of the horrific toll exacted by the 15-month war. The rights watchdog interviewed 30 rape survivors – some as young as 14 – and other victims of violence to draw a picture of the atrocities in Chenna and Kobo in August and September after rebels fromthe Tigray People’s Liberation Front (TPLF) seized control of the towns. Nearly half the victims of sexual violence said they were gang-rape…