Gunfire rang out early on Monday across parts of Goma, the largest city in eastern Congo, hours after Rwanda-backed rebels said they had seized the city despite the United Nations Security Council's calling for an end to the offensive.

Rwandan-backed rebels captured the city of Goma in eastern Congo early Monday, according to a press release by the M23 rebel movement. The city's capture came following a 48-hour deadline imposed by the group for the Congolese army to surrender their weapons.

Tens of thousands of people are fleeing towns in the Democratic Republic of Congo's east, as rebel forces close in on the city of Goma. Explosions and gunshots were heard in city - home to more than a million people - late on Sunday evening, according to local media reports.