The rebels said the ceasefire would start Tuesday. The announcement came shortly after the U.N. said 900 people were killed in last week’s fighting in Goma between rebels and Congolese forces.

Rwandan-backed armed group M23 announced a humanitarian “ceasefire” from Tuesday in DR Congo’s perennially explosive east, days before a planned crisis meeting between Congolese President Felix Tshisekedi and Rwandan President Paul Kagame.

The Rwanda-backed rebels who seized a major city in eastern Congo have declared a unilateral ceasefire, citing humanitarian grounds. But, there was no sign of them giving up control of Goma at the heart of a region home to trillions of dollars in mineral wealth.