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.

The U.N.'s top human rights body agreed Friday to a text presented by Congo that “firmly condemns” support of rebel fighters by neighboring Rwanda in eastern Congo. It also orders the creation of a team of experts to examine rights violations in the region.

The march by Rwanda-backed rebels across eastern Congo risks escalating into a regional conflict, with countries such as Burundi, Uganda, and Tanzania already involved. Despite diplomatic efforts, tensions remain high.