Rwanda-backed rebels were 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 in recent days following a major escalation of their yearslong rebellion.

As the M23 seeks to advance after capturing the strategic city of Goma this week, UN High Commissioner for Human Rights Volker Turk “calls for an end to the violence and for all parties to uphold their obligations under international human rights law”.

Rwanda-backed rebels who have captured eastern Congo’s largest city say they plan to take their rebellion to the capital and seek to gain political power