U.N. special envoy Mary Robinson has arrived in the eastern Democratic Republic of Congo (DRC) city of Goma, following a week of heavy fighting between Congolese and allied U.N. soldiers against M23 rebels entrenched in the hills above the strategic city. Robinson, the U.N. envoy to the Great Lakes region of central Africa, will meet with Congolese leaders before traveling to Uganda and Rwanda. The rebels announced a unilateral cease-fire on Friday. Congolese government spokesman Lambert Mende said Monday in Kinshasa he hoped Robinson would speak firmly with Rwanda, which denies supporting the rebels. "When it comes to Rwanda and what they're going in Congo, it's been total silence," he said.