Keria Ibrahim is one of nine executive committee members of Tigray People’s Liberation Front (TPLF), whose forces have been fighting government troops for the past month.
Ms Keira served as speaker of the House of Federation, Ethiopia’s upper parliamentary chamber, before resigning in June after the planned August election was postponed due to the coronavirus pandemic.
At the time she accused Prime Minister Abiy Ahmed of running a “dictatorial regime” and violating the constitution.
In September TPLF went on and held its local elections, a move that angered the federal government.
Mr Abiy launched a military offensive in Tigray on 4 November accusing TPLF leaders of treason after its fighters attacked a federal government military base.
The month-long conflict has killed hundreds and displaced thousands of people.
Despite Mr Abiy announcing over the weekend that the military campaign was over and successful, fighting is reportedly still ongoing in parts of Tigray region.
It has been difficult to verify claims from the federal and Tigray regional government because communication is heavily hampered.