Rwandan-backed M23 rebels in the Democratic Republic of Congo threatened on Tuesday to advance on the provincial capital of Bukavu, citing a "dangerously deteriorating" situation, amid renewed skirmishes on the front line.

The takeover of Bukavu would constitute an unparalleled extension of territory under the M23’s control, as well as a further blow to Kinshasa’s authority in eastern Congo following the collapse of Goma,

The U.N. says more than 110,000 displaced people have in recent days left settlement camps in eastern Congo's cities controlled by Rwanda-backed rebels after the rebels were accused of forced camp closures.