After 3 UN peacekeepers were killed in eastern Congo, Guterres emphasised that attacks against UN staff may constitute a war crime United Nations chief Antonio Guterres called on Sunday on Rwandan forces to withdraw from Democratic Republic of Congo (DRC) and halt support for fighters advancing on the key Congolese city of Goma.

M23 rebels, reportedly backed by Rwanda, claimed control of Goma, the largest city in eastern Congo, early Monday. This development comes as the Congolese government cut diplomatic ties with Rwanda, with Congolese spokesman Patrick Muyaya calling the situation a "declaration of war.

GOMA, Democratic Republic of Congo (Reuters) -Rwandan-backed rebels marched into east Congo's largest city Goma on Monday and troops from the east African neighbours exchanged fire over the border in the worst escalation of the long-running conflict for more than a decade.

Gunshots rang out Sunday night in the centre of the besieged Congolese city of Goma, AFP journalists heard, after the Democratic Republic of Congo accused Rwanda of sending fresh troops across the border to capture the strategic hub.

United Nations chief Antonio Guterres on Sunday urged Rwanda to withdraw its forces from the eastern Democratic Republic of Congo where fierce fighting raged as Kigali-backed fighters closed in on the major city of Goma.

United Nations chief Antonio Guterres, meanwhile, called on Sunday on Rwandan forces to withdraw from Congo and halt support for fighters advancing on the key Congolese city of Goma.

Gunfire broke out on Sunday night in the centre of the besieged Congolese city Goma after the Democratic Republic of Congo accused neighbouring Rwanda of sending more troops across the border to help pro-Kigali fighters capture the provincial capital.

M23 rebels said they have advanced into Goma, a large city in the eastern Democratic Republic of Congo. Hundreds of thousands of residents have been displaced.

Fighting with M23 rebels in eastern Democratic Republic of Congo left six United Nations peacekeepers dead, UN officials said Saturday.

Rwanda-backed rebels claimed they captured eastern Congo’s largest city, Goma, early Monday, as the United Nations described a “mass panic” among its 2 million people and Congo’s government said the rebel advance was a “declaration of war.

GOMA, Congo (AP) — Panic spread in eastern Congo's main city on Thursday, with M23 rebels steadily inching closer to Goma and seizing a nearby town as they battle the Congolese army. Bombs were heard going off in the city's distant outskirts and hundreds of wounded civilians were brought in to the main hospital from the area of the fighting.