The Democratic Republic of the Congo has severed diplomatic relations with Rwanda. The decision is based on allegations that authorities in Kigali are supporting rebels attacking Congolese government forces.

France and Britain have called on Rwanda to address accusations of supporting the M23 rebels in recent conflicts near Goma, in eastern Congo. At a U.N. Security Council meeting, both countries urged Rwanda to withdraw its troops from Congo territory amid escalating tensions.

Rebels in Democratic Republic of Congo are closing in on a key city in the mineral-rich region aided by neighboring Rwanda’s army, the head of a peacekeeping mission told United Nations Security Council members during an emergency meeting on Sunday.

The Democratic Republic of Congo has severed diplomatic relations with Rwanda. This decision is due to the government in Kigali supporting rebels who are attacking Congolese government forces. At least 13 soldiers from international peacekeeping forces have lost their lives in the internal conflict.

M23 insurgency has intensified, with the Rwanda-backed rebels seizing control of more territory than ever before, prompting the U.N. to warn of the risk of a broader war. South Africa said nine of its peacekeepers were killed in fighting.