Several towns that fell to armed groups in eastern Congo’s North Kivu and South Kivu provinces have been recaptured by government forces, a Congolese army spokesman said, even as the rebels have made advances in other areas amid intensified fighting in the conflict-battered region.

Eastern Congo has been in conflict for decades with more than 100 armed groups, most of which are vying for territory in the vast and mineral-rich region near the border with Rwanda. The conflict has created one of the world’s largest humanitarian crises with more than 7 million people displaced, including 100,000 who have fled their homes this year.

The Congolese army said some of the recovered towns have been occupied by rebels for months, including Ngungu, a key town in the Masisi territory that is near the North Kivu provincial capital, Goma. Some Masisi villages, however, remain under the control of rebels, including its center known as the Masisi Center.