Fifteen-year-old Eysa Mohammed was collecting water near her home in northern Ethiopia’s Afar region when an explosion underfoot tore shrapnel into her leg, making her one of a growing number of children maimed by weapons discarded in the country’s civil war.

“So much blood was spilling from my right foot,” Eysa told Reuters in her family hut in the town of Kasagita. Doctors removed two large pieces of metal from her leg in February but she can no longer walk.

Fighting in northern Ethiopia, which began in November 2020 in the Tigray region and spilt over into Afar and the Amhara region last year, has eased since the end of March. The federal government declared a unilateral ceasefire last month in a war that has killed thousands of people. On April 25, Tigrayan forces announced they would withdraw from Afar...