The fifth rebel-held town to be seized by the Congolese army recently.
Congo's M23 rebels clashed with government troops on near the eastern city of Goma.
"Major breakthroughs" in talks mediated by Uganda.
M23 allegedly bankrolling rebellion by selling gold to exporters.
The World Wildlife Fund is trying to block proposed oil exploration in Africa's oldest national park where 200 gorillas live.
The Congo conflict is a spillover from the 1994 genocide in Rwanda.
Accusations heighten tension along countries' shared border.
Last month, gov't troops exchanged heavy fire with M23 rebels.
Brig. Gen. Xolani Mabanga says there are currently no "offensives" by either side.
Negotiations between DRC government, M23 rebels have stalled.
