The fighting between Ethiopian federal troops and regional forces in Tigray has forced thousands of people to flee to Sudan for safety. The UN has warned of a full-scale humanitarian crisis. Ethiopia's Nobel Peace Prize winning prime minister, Abiy Ahmed, says there will be no let-up in his government's 'law enforcement' mission. His aim is to arrest and put on trial TPLF party politicians who he alleges have put the country's constitution in danger. Ethiopia plays a key role in maintaining security in the Horn of Africa. With a population of more than 110 million, and one of the fastest growing economies on the continent, what happens in Ethiopia will inevitably have a wider regional impact. So how did the TPLF - a group which once dominated Ethiopian politics - end up being accused of destroying national unity? Did PM Ahmed opt for a military confrontation before all avenues for negotiation were explored? And what role should Ethiopia's neighbours play in this conflict? Ritula Shah is joined by a panel of experts.