C orneille nangaa sits in an armchair in a five-star-hotel in Goma, the largest city in eastern Democratic Republic of Congo and stretches out his hand. “Thank you for embracing the terrorists,” he jokes, to laughter from his entourage.

Rwanda-backed rebels gained ground in eastern Congo on Wednesday despite the unilateral ceasefire they declared earlier this week, taking control of a town 100 kilometers (60 miles) from the provincial capital of Bukavu,

Rebel groups, including the M23 rebels, have declared a humanitarian ceasefire in the Democratic Republic of Congo. At least 900 have been killed and nearly 3,000 others injured in recent fighting around the city of Goma,