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,

Hopes for a ceasefire in the Democratic Republic of Congo are fading as the Rwanda-backed rebel group, M23, is vying to expand its control. NBC News’ Steve Patterson reports on the violence in the mineral-rich country.