Congolese security forces on Tuesday tried to slow the advance of Rwanda-backed M23 rebels who say they have captured Goma after entering eastern Congo's largest city, as U.N. officials reported violence,

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.

At least 17 people have been killed in clashes between M23 rebels backed by Rwanda and forces loyal to the Democratic Republic of Congo's government in the eastern city of Goma, hospital sources