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.

Goma, Democratic Republic of the Congo - Residents and M23 supporters shout slogans as they celebrate the takeover of the city by M23 fighters at the governor's office compound in Goma, after the M23 (March 23 Movement) rebel group launched a large-scale offensive in eastern DRC.