M23 rebels backed by Rwanda took the city of Goma in a bloody battle. This weekend, the group entered the gold-trading center of Bukavu in eastern Congo after government soldiers fled.

As Rwanda-backed rebels strolled through the streets of eastern Democratic Republic of Congo's second-largest city, President Felix Tshisekedi's office claimed it was actually still controlled by his army and "valiant" allied forces.

Rebel forces have been seen in the center of Bukavu, the second largest city in the eastern Democratic Republic of Congo (DRC), on Sunday, residents told CNN, as the fighters push to expand their foothold in the mineral-rich region.