The leader of bishops in the Philippines has issued a statement fiercely critical of President Rodrigo Duterte's violent crackdown on drug-related crime in the country.

The crackdown has been one of the biggest and bloodiest in the Philippines' recent history and has alarmed human rights groups and the Church. But Duterte has dismissed their concerns and has openly threatened to kill crime suspects, assuring law enforcers that he would defend them if they face lawsuits while battling criminality.