(Reuters) -Rwandan-backed M23 rebels asserted their control over east Congo's largest city Goma on Thursday by calling on residents to resume normal life, even as the group clashed with Congolese troops as they tried to take more territory.

Fighting has escalated sharply in recent weeks in eastern Congo, where rebels have seized key towns and are closing in on the city of Goma, the government’s last stronghold in the North Kivu province,

The M23 militia, funded and directed by Rwanda, said it had seized the city of Goma, terrifying its people, many of whom sought shelter there after fleeing the rebel advance.

Rebels backed by Rwanda captured more towns in eastern Congo on Wednesday as they moved beyond the key city of Goma in an apparent attempt to expand their control in the conflict-battered region. The rebels advanced toward the center of South Kivu province after taking several towns,

As an East African bloc urged an immediate ceasefire in eastern Democratic Republic of Congo, Rwandan-backed M23 rebels who seized the city of Goma extended their advance on Wednesday, and Congo said it planned a campaign to recover lost territory.

The United Nations says Rwanda-backed rebels captured large parts of eastern Congo’s largest city of Goma including its airport