Volker Türk said Tuesday that his office "confirmed cases of summary execution of children by M23 after they entered the city of Bukavu last week."

DAKAR, Senegal (AP) — The U.N. human rights chief accused Rwanda-backed rebels who seized a second major city in eastern Congo of killing children and attacking hospitals and warehouses storing humanitarian aid.

Rwanda rejects allegations from Congo, the United Nations, and Western powers that thousands of its troops are fighting alongside the Tutsi-led M23. It says it is defending itself against the threat from a Hutu militia,

Officials and residents say Rwanda-backed rebels have gained ground in eastern Congo despite the unilateral ceasefire they declared earlier this week, taking control of a town 100 kilometers (60 miles

Rwanda has criticized South Africa's military involvement in eastern DR Congo, accusing Pretoria of fighting on the behalf of Congolese President Félix Tshisekedi while masking economic interests under the guise of peacekeeping.

The accusation comes after M23 seized more territory in the east of the Democratic Republic of Congo. View on euronews

The U.N.’s top human rights body has condemned Rwanda’s support of rebel fighters across the border in eastern Congo and ordered a team of experts to examine rights violations in the region