The U.N.'s top human rights body was holding an urgent session on Friday on spiralling violence in eastern Congo, where Rwanda-backed rebels recently captured a key city and some 3,000 people have been killed and nearly as many injured since late January.

Worse violence "may be yet to come" in the conflict-hit Democratic Republic of Congo, UN High Commissioner for Human Rights Volker Türk said on Friday. An offensive by the Rwanda-backed M23 rebel group against Congolese forces in and around the eastern city of Goma has left almost 3,

The U.N. secretary-general appealed Thursday for peace in the Democratic Republic of Congo, where a recent escalation of fighting between rebels and the national army has killed at least 2,900 people and displaced tens of thousands.

The rebels continued advances in eastern Congo despite their own announcement of a cease-fire. The U.N. secretary-general called for them to lay down their guns and agree to mediation.