(Reuters) -Chaotic scenes unfolded in the eastern Congo city of Bukavu on Saturday after Rwanda-backed M23 rebels reached its outskirts, while a threat by Uganda's army chief to attack a Congolese town raised fears of the conflict flaring into a wider regional war.

M23 fighters on Friday seized the airport serving Bukavu in eastern Democratic Republic of Congo, just as African leaders gathered for crisis talks on the escalating crisis. Violence in the restive region has sparked fears of a wider conflict, as a number of neighbouring countries already have a military presence on the ground.

(Reuters) -Rwandan-backed M23 rebels who in late January captured Goma, the biggest city in eastern Congo, have since been advancing around one of Africa's great lakes, Lake Kivu, towards the