Rwanda-backed rebels capture Goma, Congo, leading to humanitarian crisis, U.N. concerns, and regional peacekeeping efforts.

Rwandan-backed M23 rebels say they are now in control of the key eastern Congolese city of Goma. Their fighters continue to claim more territory in one of the world's most mineral-rich territories.

The UN says at least 700 people have been killed since Sunday.The M23 rebel group was advancing towards another city in the ...