Leaders from eastern and southern Africa on Saturday called for an immediate ceasefire in eastern Congo, where rebels are threatening to overthrow the Congolese government, but also urged Congo's president to directly negotiate with them.

Rwandan-backed M23 rebels have seized control of a mining town in eastern Democratic Republic of Congo's South Kivu province, eight sources said on Wednesday, in an apparent violation of a unilateral ceasefire they declared this week.

The alliance of rebel groups in eastern Democratic Republic of Congo have declared a humanitarian ceasefire starting on Tuesday. In a statement, the group - which includes the Rwanda-backed M23 rebels - cited "humanitarian reasons" for the ceasefire, after it has been capturing territory in eastern parts of the country.