The allegations were first made by Amnesty International in a report published in July. Their report said dozens of suspected supporters of the terror group Boko Haram “were held incommunicado, tortured, and sometimes killed by Cameroonian security forces in facilities run by the military and intelligence services.” Amnesty alleges that Cameroon’s Rapid Intervention Battalion, an elite army unit, was one of the units that engaged in torture, doing so at the military base known as Salak, near the northern city of Maroua. ... Amnesty called on the US and the French government, which it says also used the base, “to...