KINSHASA, Congo - United Nations special envoy Mary Robinson has arrived in the eastern Congolese city of Goma, following a week of heavy fighting pitting Congolese and U.N. troops against a rebel group entrenched in the hills above the strategic city.

Robinson will meet with Congolese leaders before travelling to Uganda and Rwanda. The rebels, who are widely believed to be backed by Rwanda, announced a ceasefire on Friday.

Lambert Mende, the Congolese government spokesman, said on Monday he hoped Robinson would speak firmly with Rwanda, which denies supporting the rebels.

He said: "When it comes to Rwanda and what they're doing in Congo, it's been total silence."

Tanks were seen leaving the Rwandan capital and heading toward the Congo-Rwanda border at the weekend.