Amnesty International on Monday urged the UN Security Council to maintain its arms embargo on South Sudan amid widespread reported violence against civilians by government and former opposition forces. The London-based group accused fighters in the South Sudan People's Defence Forces (SSPDF) and the Sudan People's Liberation Army-in-Opposition (SPLA-IO) -- both loyal to former opposition leader and now the first Vice President Riek Machar -- of extrajudicial executions, forced displacement ...