Fighting across the largest city in eastern Democratic Republic of Congo and "is still very much ongoing ... it's not over yet," senior U.N. official in Congo, Bruno Lemarquis, said on Monday after Rwandan-backed M23 rebels claimed to have control of Goma.

Heavy artillery fire rocked the eastern Congolese city of Goma on Monday as France warned the capital of the mineral-rich region was on the brink of falling to militia fighters and Rwandan troops. Repeated explosions from heavy artillery and intense bursts of gunfire echoed across central Goma on Monday,

Heavy artillery fire could be heard in Goma on Monday, hours after Rwandan troops and fighters from the M23 rebel group entered the capital of North Kivu Province. The UN has warned of a looming crisis.