manila philippine president rodrigo duterte say friday terminate intermittent peace talk maoist-led rebel would consider terrorists hostilities continue negotiations end nearly half-century long conflict communists 40,000 people kill among duterte priorities take office june last year duterte say would consider political arm maoists terrorist group demand dozens rebel leaders free last year order restart talk turn order release temporarily surrender face punitive action duterte speech soldier let say try reach say duterte thursday sign proclamation end peace talk start august last year broke norway talk intermittent since 1986. find unfortunate members fail show sincerity commitment pursue genuine meaningful peaceful negotiations duterte spokesman harry roque say statement late thursday may government negotiators cancel round formal talk maoist-led rebel netherlands guerrillas step attack countryside rebel choice intensify guerrilla warfare rural areas jose maria sison chief political consultant national democratic front philippines ndf say statement ndf political arm maoist guerrillas say regret unilateral cancellation talk vital social economic reform government troop advise stay alert movements estimate 3,800 leftist guerrillas say military spokesman major-general restituto padilla government force also battle islamist fighters south largely christian country recently occupy town several months big battle philippines since world war two philippines duterte ditch peace process maoist rebel