Congo’s leader called on young people to massively enlist in the army to help fight Rwanda-backed rebels who were attempting to seize more territory in the country's east as a crucial meeting of neighbors asked the Congolese government to talk with the rebels.

Rwanda's ally Uganda, unhappy about another rebel group in DR Congo that threatens its security, has also been accused of helping the M23 - with its officers also spotted at Tchanzu. The UN experts say Uganda has also supplied weapons, hosted rebel leaders and allowed cross-border movements of M23 fighters - accusations Kampala denies.

A rebel alliance spearheaded by the ethnic Tutsi-led M23 militia said it had seized the lakeside city of more than 2 million people.