KHARTOUM (Reuters) - Several Ethiopians, including army soldiers, fled the escalating conflict in the restive Tigray region to neighbouring Sudan on Monday, Sudanese state media and residents said. The flare-up in the northern region bordering Eritrea and Sudan has killed hundreds of people, Ethiopian sources on the government side said, even as the prime minister sought on Monday to reassure the world his nation was not sliding into civil war. The worsening conflict threatens to destabilise Africa’s second most populous nation, where ethnic conflict has already killed hundreds since Prime Minister Abiy Ahmed took over in 2018.