By Yassin Kombi and David Lewis GOMA, Democratic Republic of Congo (Reuters) -As an East African bloc urged an immediate ceasefire in eastern Democratic Republic of Congo, Rwandan-backed M23 rebels who seized the city of Goma extended their advance on Wednesday,

Advances being made by the M23 rebel group in the Democratic Republic of Congo are "heightening the threat of a regional war," according to U.N. Secretary General Antonio Guterres.

Angolan President João Lourenço received his Congolese counterpart Félix Tshisekedi for a joint analysis of the steps to be taken within the framework of the Luanda Process, after the situation created with the seizure of Goma by rebel forces.

Angolan President Joao Lourenco has urged warring parties in the Democratic Republic of Congo (DRC) to return to peace talks, which collapsed last year, the foreign ministry said.

Angola’s President Joao Lourenco demanded the immediate withdrawal of Rwandan troops from Congolese territory on Wednesday amid fighting with the M23 rebels in Goma. Lourenco, who is the African Union (AU) mediator between Congo and Rwanda, also urged the resumption of peace talks with the M23 and all other groups operating on Congolese territory.

The latest fighting has heightened an already dire humanitarian crisis in the region, forcing half a million people from their homes since the start of the year.

President Paul Kagame says Rwanda was ready for 'confrontation' as he rejected criticism over his backing for M23 rebels who were pushing south in eastern Democratic Republic of Congo

DR Congo President Felix Tshisekedi insisted his troops were mounting a "vigorous" response to Rwanda-backed fighters advancing in the country's perennially troubled east and slammed the international

A conflict that has raged for decades reached a flashpoint this week when rebels backed by Rwanda marched on a key Congolese city in a bid to occupy territory and exploit minerals.

The conflict comes amid rising global tensions after Donald Trump’s election, especially between Washington and Beijing, over control of strategic minerals like those present in the Congo.

Angolan President Joao Lourenco has urged warring parties in the Democratic Republic of Congo (DRC) to return to peace talks, which collapsed last year, the foreign ministry said.

Rwanda-backed fighters were in control of almost all of the DR Congo city of Goma Wednesday where residents were re-emerging after days of deadly fighting and Angola urged leaders of