GOMA, Democratic Republic of Congo (Reuters) -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,

Rwandan-backed M23 rebels captured the mining town of Nyabibwe in eastern Congo’s South Kivu province, violating a ceasefire they declared earlier this week, according to NBC News. The rebels now advance toward Bukavu, raising fears of further conflict after seizing the city of Goma last week.

Rebel groups, including the M23 rebels, have declared a humanitarian ceasefire in the Democratic Republic of Congo. At least 900 have been killed and nearly 3,000 others injured in recent fighting around the city of Goma,