Rwandan President Paul Kagame blasted criticism of his country's role in eastern Democratic Republic of Congo where rebels his government backs have seized its largest city, saying Kigali is prepared for "confrontation" if necessary.

Much of the beleagured city of Goma was calm early Wednesday morning, after a day during which thousands of fleeing people hunkered down by roadsides as missiles flew and injured people streamed to overwhelmed hospitals.

Rebels backed by Rwanda captured more towns in eastern Congo on Wednesday as they moved beyond the key city of Goma in an apparent attempt to expand their control in the conflict-battered region. The rebels advanced toward the center of South Kivu province after taking several towns,