Rwandan-backed rebels captured the city of Goma in eastern Congo early Monday, according to a press release by the M23 rebel movement. The city's capture came following a 48-hour deadline imposed by the group for the Congolese army to surrender their weapons.

Congo has severed diplomatic ties with Rwanda as fighting between Rwanda-backed rebels and government forces rages around the key eastern city of Goma, leaving at least 13 peacekeepers and foreign soldiers dead and displacing thousands of civilians.

The three-year insurgency by the Rwanda-backed rebel group M23 has intensified, and the U.N. warned the violence could spill into a wider war.