Rights group says Colombian rebels committed abuses against civilians in disputed region / Colombia's Indigenous Nasa people fight back against guerrilla groups / In the jungle with the secretive Colombian guerrillas key to country's future / Colombian guerrillas withdraw threat to disrupt UN biodiversity summit / Colombian guerrillas launch multiple attacks against military as ceasefire breaks down / Colombian guerrillas free Liverpool striker Luis Diaz’s kidnapped dad / Footballer Luis Díaz's father freed by Colombian guerrillas / Colombia's ELN guerrilla group frees father of Liverpool striker Luis Diaz