EDUARDO SOTERAS/AFP via Getty Images

Ethiopian Prime Minister Abiy Ahmed on Sunday issued an ultimatum to the leaders of the country's northern Tigray region, telling them to surrender to federal forces within 72 hours. If the Tigray People's Liberation Front rejects the warning and holds out, as they say they intend to do, the government's troops will allegedly move to take Tigray's capital city Mekelle by force Wednesday.

But, Al Jazeera reports, even the capture of Tigray may not end the conflict that broke out earlier this month after long simmering tensions. Already, hundreds of people have died and tens of thousands have fled, but "the conflict could evolve," Ahmed Soliman, a research fellow at London think tank, Chatham House, told Al Jazeera. "There is the frightening possibility it could become entrenched," he said. "Both sides are heavily armed and this could lead to a prolonged insurgent warfare."

There is also the concern, Soliman added, that "the conflict could also spill over into neighboring countries."

The United Nations fears major hostilities may soon break out, as well, and U.N. Security Council will hold a meeting Tuesday to discuss the fighting. Read more at Al Jazeera and BBC.