Could conflict in eastern Democratic Republic of Congo expand across region?

Hundreds of people killed and hundreds of thousands forced from their homes. A weeks-long offensive by Rwanda-backed rebels in eastern Democratic Republic of Congo is spiralling into a regional crisis. The UN estimated last year close to 4,000 Rwandan soldiers are involved. Kinshasa says the M23 armed group wants control of the region that is rich in minerals. Rwanda denies supporting the rebels and says it has deployed troops to stop the fighting from spreading into its territory. Leaders from southern and eastern Africa are trying to mediate between the two sides. Will their efforts succeed?