KINSHASA, Nov. 28 (Xinhua) -- Tutsi rebels in the Democratic Republic of Congo (DR Congo) entered the town of Ishasha as fresh fighting broke the fragile lull in the eastern province of North Kivu, the UN peacekeeping mission in the country reported on Friday.

    The mission known as MONUC said peacekeepers were moving to the town bordering Uganda after the rebel National Congress for the Defense of the People (CNDP) had reportedly taken it in the morning.

    Reports from the front also said the rebel seized two border posts.

    After a lull that lasted a few days, the CNDP led by Laurent Nkunda has launched a new offensive on the pro-government Mai Mai militia.

    More than 10,000 refugees fled into Uganda during the battle over Ishasha, about 100 km from the provincial capital Goma, the UN refugee agency UNHCR reported.

    In another development, the UNHCR said on Friday that it is trying to evacuate refugees from the Kibati camp to a safer place in Mugunga.

    The Kibati camp sheltering at least 50,000 refugees is believed in danger of possible attacks as it is close to Goma, which is being patrolled by UN peacekeepers with the CNDP rebels stationed at the gate of the town.

    The fighting prompted another mission by UN special envoy Olusegun Obasanjo, who arrived in the DR Cong on Friday after wrapping up talks on Nov. 16 with a truce pledge by Nkunda.

    Obasanjo is scheduled to meet with President Joseph Kabila and the leaders of several militia groups, including Nkunda.

    After previous talks, Obasanjo said Nkunda had accepted his role as the UN special envoy in mediating a peace deal. Nkunda also pledged to observe the cease-fire he had unilaterally called on Oct. 29, if not attacked, while opening humanitarian corridors for UN aid to refugees, Obasanjo told reporters a dozen days ago.

    A lull followed his mission with a pullback reported from Kanyabayonga and Rwindi a few days later by the CNDP at the order of Nkunda.

    The government army FARDC and the CNDP rebels resumed hostilities in August after signing a UN-brokered deal in January.

    The conflict has displaced 250,000 people and threatened the stability of the Great Lakes region in Africa. The UN Security Council has decided to add 3,100 troops to the currently 17,000- strong peace mission in DR Congo, in a step to avert a repeat of the 1998-2003 war which sucked in several neighboring countries.