Analysts say the deadly march by Rwanda-backed rebels across eastern Congo could widen into a regional conflict drawing in even more countries, and two neighboring nations with the most involvement in the mineral-rich area might be the key to stopping the violence.

Despite a regional summit to stop fighting in the eastern Congo, no resolution is in sight. The European Union is also trying to straddle its support for Rwanda, while tempering its forceful presence in the DRC.

The U.N. says more than 110,000 displaced people have in recent days left settlement camps in eastern Congo’s cities controlled by Rwanda-backed rebels after the rebels were accused of forced camp clo