Ivorian government forces vowed to hunt down those responsible for an ambush that killed at least seven United Nations peacekeepers as Liberia sealed its border amid fears that the gunmen had used the country to stage the attack.

Armed men ambushed and killed seven United Nations peacekeepers trying to protect villagers in Ivory Coast.

Rebels loyal to a renegade warlord seized an east Congo army base and the headquarters of a park housing some of the world’s last mountain gorillas, in heavy fighting today that sent thousands of civilians fleeing, UN officials and rebels said.