Philippine President Rodrigo Duterte said Saturday he would scrap peace talks with communist rebels and asked several rebel leaders who were freed for the negotiations to return to prison or face arrests in the latest blow to efforts to peacefully settle one of Asia’s longest-running rebellions. Duterte said at a late-night news conference in southern Davao city that he would ask government negotiators not to participate in talks with the Maoist guerrillas scheduled to resume this month in Norway, repeating that “peace with the communists might not come in this generation.”