Escalating violence between government troops and rebels in the Democratic Republic of Congo has spurred the U.N. Security Council to convene for emergency talks. The rebel group M23 is comprised of ethnic minority, ex-Congolese government soldiers who mutinied against unequal pay and bad conditions in the army last year. Since then, M23 fighters have been accused of atrocities and war crimes. France’s call for a Security Council meeting came after a U.N. peacekeeper was killed and mass graves discovered in eastern Congo. In the meantime, U.N. envoys, the U.S. and the EU have called for “maximum restraint” as the army tries to cracks down on the rebels.