Democratic Republic of Congo's M23 rebels are moving south towards Bukavu, the capital of South Kivu province, in what appears to be an attempt to expand their area of control in the country's east after capturing the city of Goma.

The United Nations says Rwanda-backed rebels captured large parts of eastern Congo’s largest city of Goma including its airport.

The leaders of DR Congo and Rwanda are meeting at an emergency East African summit in Kenya on Wednesday as M23 rebels, backed by Rwandan troops, tighten their grip on the strategic eastern city of Goma.