He spoke at an emergency meeting of the UN Human Rights Council called by Congo to investigate massive rights violations it blames on Rwandan-backed M23 rebels who have taken the city of Goma and are seizing more territory.

"If nothing is done, the worst may be yet to come, for the people of the eastern Democratic Republic of Congo (DRC), but also beyond the country’s borders," Turk told a packed room of diplomats and rights groups in Geneva. "All those with influence must act urgently to put an end to this tragic situation."

Turk said he was horrified by emerging, multiple reports of rape, gang rape and sexual slavery. "This is likely to worsen in the current circumstances," he said.

Rwanda's envoy rejected allegations that it was responsible, saying it had proof of an intended major attack by its western neighbour.

Dozens of countries at the meeting condemned rights violations in Congo including several African states. Washington, formerly a vocal council member, left its seat empty after President Donald Trump announced the US was leaving.

Congo has submitted a motion seeking the creation of a UN Fact-Finding Mission which would be due to provide a full report on eastern Congo abuses by September 2025.

The motion was adopted by consensus on Friday. An internal United Nations memo on the negotiations seen by Reuters ahead of the decision showed Rwanda was the only dissenting voice.

While the council has no legally binding power, its debates carry political weight and scrutiny can raise global pressure on governments. Sometimes, investigations mandated by the council can lead to prosecutions for war crimes in international courts.

--Reuters--