At least 20 prisoners were killed and nearly 100 people, mostly prisoners, were wounded on July 6 in clashes that erupted at the prison in the coastal town Negombo. It is a grim reminder of past prison massacres in Sri Lanka’s history. The carnage came just one day after an earlier clash at the same facility claimed two lives on July 5, bringing the death toll from the unrest to at least 27. Seven...