Sermons in churches throughout the country target the extrajudicial killings as part of the war on drugs.
The Philippines' leader said he would target more "son of a bitch" traffickers and drug dealers.
The rights group claims Duterte's drugs war involves extrajudicial executions and falsified evidence.
Philippines president says he would impose restrictions if the drug problem deteriorates 'into something really very virulent.'
The move is likely to face fierce resistance from pro-life religious groups.
The Philippines' president has repeatedly shown hostility towards the U.S.
The president's threat to impose a firecracker ban achieved a "remarkable" decline in accidents.
Peace is good for business. War, terrorism and trade wars are bad for business.
A survey showed that a majority of Filipinos saw the drugs war as excellent, but disapproved of killing criminals.
President Rodrigo Duterte has told police they may "shoot to kill" drug dealers.
Mendoza has filmed government advertisements in support of Duterte's crackdown on drug gangs.
Duterte said he will not let his people be killed over a respect for human rights.
It is the second kidnapping in the Philippine region in a week.
The Philippine leader looks for better ties after a fraught relationship with Barack Obama.
Reports emerged earlier this week that the U.S. could block the sale of 26,000 rifles.
Relations between Washington and Manila deteriorate further over Duterte's policies.
Islamist militants groups are responsible for many of the journalist killings, said the Committee to Protect Journalists.
The firebrand leader threatened to scrap defense pacts to oust foreign troops.
The firebrand Philippine leader launched another anti-U.S. tirade on Tuesday.
Former Philippine justice secretary Leila de Lima said Duterte's campaign inspired lawlessness.
"Duterte wants to make an example of me so that nobody will speak out," says Leila de Lima.
The Philippine leader's support at home comes in spite of international criticism of his crackdown on drug gangs.
Vietnam's relations with the U.S. have quickly expanded in the wake of the escalating South China Sea dispute, putting the Philippines in an unexpectedly isolated position.