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.

The Rwanda-backed rebels who captured a major city in eastern Congo have sought to reassure its residents about their safety

Rwanda-backed rebels were quickly expanding their presence in eastern Congo after capturing Goma, the region's major city, the U.N. said Friday, also expressing concerns over executions it learned were carried out by the rebels following a major escalation of their yearslong rebellion.