Congo has severed diplomatic ties with Rwanda as fighting between government forces and M23 rebels supported by Rwanda escalates around Goma, resulting in at least 13 peacekeepers dead and thousands of civilians displaced. The M23 rebel group has made substantial territorial gains, threatening Goma's safety, while accusations against Rwanda's involvement in the conflict persist. Despite Rwanda's denial of backing the rebels, U.N. experts estimate up to 4,000 Rwandan troops may be present in Congo. An emergency U.N. Security Council meeting has been scheduled to address the ongoing crisis and humanitarian concerns.