A former top Central African Republic football official and a militiaman nicknamed Rambo go on trial at the International Criminal court Tuesday charged with war crimes and crimes against humanity.

Qatar stressed the importance of accountability for all those responsible for human rights violations, war crimes and crimes against humanity in Syria and bringing them to international justice.

UN investigators on Wednesday warned that crimes against humanity and other serious rights violations were continuing unabated in Burundi, blaming in part President Pierre Nkurunziza's repeated calls to hatred and violence.

The 50-page complaint calls for President Rodrigo Duterte's indictment for what it describes as thousands of extrajudicial killings.

The announcement to withdraw comes five weeks after a court prosecutor said a preliminary examination had been opened into President Rodrigo Duterte's deadly war on drugs.

Burundi on Friday became the first ever nation to leave the International Criminal Court, set up some 15 years ago to prosecute those behind the world's worst atrocities.

Former Chad president Hissene Habre, a Cold War ally of the West, was convicted on Monday of war crimes and crimes against humanity for ordering the killing and torture of thousands of political opponents during his eight-year rule.