Columbian President, Juan Manuel Santos has postponed peace talks with the rebels, the National Liberation Army (ELN). He said the government remained committed to making peace but the release of former congressman Odin Sanchez, must happen first. Sanchez, has been held hostage since he volunteered to swap places with his ill brother.<br/><br/>Meanwhile, the government's top peace negotiator, Juan Camilo Restrepo, has said an operation is under way for the leftist guerrillas to hand Sanchez over to the Red Cross. Colombia's government and the ELN have been engaged in an armed conflict for five decades but announced in March that they would open formal peace negotiations.