BOGOTÁ, Colombia (AP) — Holding white carnations, hundreds of Colombians marched in front of congress Tuesday to mourn the killings of human rights leaders and the murders of hundreds of former rebel fighters killed after signing a peace deal with the government that ended five decades of war. The protest was organized by human rights groups that have become increasingly concerned about attacks against civilians in rural pockets of Colombia where violence persists despite a 2016 peace deal between the government and the Revolutionary Armed Forces of Colombia — known by their Spanish acronym FARC — that had raised hopes among Colombians exhausted by years of armed conflicts.