Two campaigners investigating alleged human rights abuses have been shot dead in the Philippines, authorities said on Wednesday, deepening concerns that a “climate of impunity” is threatening rights activists. Amid criticism of his drug war from human rights groups, President Rodrigo Duterte said in August that he might just order police to shoot them so they would know what real human rights violations are like. The Human Rights Watch called on Duterte to immediately withdraw his statement or be investigated for possibly instigating or inciting violence against Philippine rights advocates.