Charges of terrorism by Duterte against United Nations expert denounced

"He needs to submit himself to some sort of psychiatric examination," Zeid Ra'ad Al Hussen, the UN High Commissioner for Human Rights, told reporters on Friday during a press conference in Geneva, which covered a range of other issues, including the situations in Venezuela and Myanmar.

Mr Zeid said the Philippine Government had added UN Special Rapporteur on the Rights of Indigenous Peoples Victoria Tauli-Corpuz's name to the "alleged membership of the Communist Party of the Philippines and the New People's Army," which has been designated a terrorist organisation.

According to Mr Zeid, Ms Corpuz believes that she has been targeted because of her comments on the attacks and killings of indigenous people in Mindanao.

"This is of course unacceptable for a special rapporteur acting on behalf of the international community whose expertise is sought by the Human Rights Council to be treated in this way," the High Commissioner said.

"And I hope and expect the Human Rights Council to respond accordingly," he added.

Turning to the "outrageous attacks" made by Mr Duterte against Agnes Callamard, the UN Special Rapporteur on Extra-Judicial summary or arbitrary Executions, Mr Zeid stressed: "These attacks cannot go unanswered."

Mr Zeid called it "absolutely disgraceful that the president of a country could speak in this way, using the foulest of language against a rapporteur that is highly respected."

Since 1 July 2016, the year Mr Duterte took office, thousands of people in the Philippines have reportedly been killed for their alleged involvement in illegal drug use or trafficking. While some killings have reportedly occurred in the context of clashes between or within gangs, it is suspected that many incidents involved extra-judicial killings in the course of police anti-drug operations, according to the Court.

In February, the Prosecutor of the International Criminal Court (ICC) announced that she would open preliminary examinations into the Government of the Philippine's "war on drugs."