Armed Indonesian police stand guard at the wreckage of the Djakarta Headquarters of the powerful Indonesian Communist Party ( P . K . I ) , after the building had been burned down by a mob of several thousand Indonesian youths . The mob , mostly muslims , left te one storey building a shambles of burning ashes . The demonstrators stormed the building shouting " Kill Aidit " ( the leader of the P . K . I ) and " dissolve P . K . I " . 11 October 1965