Philippine President Rodrigo Duterte ordered police to suspend the war on drugs after rogue officers kidnapped and killed a South Korean businessman, adding to the criticism swirling around the country’s bloody antinarcotics campaign.

Police have killed over 2,000 people in the purge since Mr. Duterte took office in June, with an additional 5,000 killed by suspected vigilantes in a spasm of violence that has transfixed the nation.

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