Rwanda-backed rebels aiming to gain power have already captured Goma, a key city in eastern DRC. They have vowed to advance to the capital, more than 1,500km away - but have met resistance from the Congolese army and its allies.

Democratic Republic of Congo's M23 rebels are moving south towards Bukavu, the capital of South Kivu province, in what appears to be an attempt to expand their area of control in the country's east after capturing the city of Goma.

The eastern DRC city of Goma was seized by M23 rebels and their Rwandan allies on 26 January. Residents have emerged to count the dead and make sense of the fast-moving offensive.