Rwanda-backed rebels who captured eastern Congo's largest city said Thursday they want to take their fight to the far-off capital, Kinshasa, while Congo’s president called for a massive military mobilization to resist the rebellion and his defense minister rejected calls for dialogue.

Video showed part of the French embassy in Congo’s capital of Kinshasa on fire as protests erupted in anger over M23 rebel advances in the eastern city of Goma. Demonstrators attacked several embassies of countries they accused of complicity in Rwanda’s alleged support of the rebel group.