Berhanu Nega is from the opposition Ethiopian Citizens for Social Justice (EZEMA) party.
BBC News, Addis Ababa
Ethiopia’s Prime Minister Abiy Ahmed is expected to be inaugurated and form a new government on Monday, following controversial elections last June that saw a landslide win for his Prosperity Party.
His party’s win, overshadowed by the war in the northern Tigray region, means Mr Abiy could be prime minister for the next five years.
He came to power in 2018 after being nominated by the ruling coalition following years of anti-government protests. At the time, he was a little-known figure who went on to immediately win the hearts of millions with his reform measures.
A rise in ethnic clashes soon posed significant problems for him. But his main challenge is now dealing with the conflict in the north, which broke out 11 months ago.
Thousands are believed to have been killed with all warring parties implicated in atrocities.
Once the darling of the international community with a Nobel peace prize under his belt, his administration is now accused of blocking aid to Tigray.
June’s elections were marred by controversy, with some of the major opposition groups boycotting the vote.
With his new government, Mr Abiy will face old problems - finding a solution to a deadly war being the most pressing one.
By Vivienne Nunis
BBC News, Africa correspondent
Mulugeta Gebrehiwot Berhe on why he joined the Tigrayan rebels fighting the Ethiopian army
Africa editor, BBC World Service
The Ethiopian prime minister says the recent withdrawal of troops and officials from the northern Tigray region should not be viewed as a sign that the government side lost the war.
Abiy Ahmed said the eight-month conflict against Tigrayan rebels had weakened them.
He said the national army still had the capacity to fight but stressed the need for there to be peace in order for Ethiopia to develop.
In an address to parliament he did not respond to the rebel TPLF's list of preconditions for there to be a bilateral ceasefire.
Hundreds of thousands of civilians in Tigray are experiencing famine-like conditions as a result of the conflict and aid agencies are appealing for unhindered access.
More on Ethiopia:
The Ethiopian government made the decision to withdraw and declare a ceasefire in Tigray in a process that took at least a month, Prime Minister Abiy Ahmed has said.
He said they had meetings with the elite, investors, the public as well as military leaders, some of whom raised concerns about the need to continue with the conflict.
He said the government has now addressed the threat posed by the Tigray People’s Liberation Front (TPLF) administration by seizing back weapons that they had taken from the northern command.
"When we look at the results, the junta has been brought before the law, the weapons they had taken they are now in our hands, the defence forces have been reorganised," he told representatives in parliament in the capital Addis Ababa on Monday.
He said before the reorganisation, part of the force would be working against the government, noting that their attempts to create division among the people had now been addressed.
He said the ceasefire declaration was a moment "for everyone to think" and learn from what was happening in Tigray.
Mr Abiy said Ethiopia’s new focus was now on resettling the people who had been displaced by the conflict, finishing development projects and addressing the Covid-19 pandemic among others.
Rebels forces in Tigray last week retook its capital, Mekelle, sparking street celebrations and forcing officials to flee. The government announced a unilateral ceasefire the same day after the recapture.
Ethiopia Prime Minister Abiy Ahmed says the country had no interest to engage in the conflict in Tigray but was forced to by circumstances.
Mr Abiy has been answering questions before the house of representatives in the capital, Addis Ababa.
He says the Tigray region's ruling TPLF administration posed a threat on four fronts including "irregular siphoning" of resources from national institutions and "mobilising elements across the country" to destabilise the country.
He also said the administration had been mobilising people for war "despite the numerous livelihood challenges of the people".
Other than those, he said the attack on the northern command in Tigray last November finally forced the government to engage in the war.
By Vivienne Nunis
BBC Africa correspondent, Nairobi
Supporters of rebel forces in Ethiopia's Tigray region celebrate as Eritrean forces leave the town of Shire.
Ethiopians took to the polls in what is seen as PM Abiy Ahmed's biggest electoral test since taking power in 2018.
The Ethiopian prime minister casts his vote in a key election for the country amid rising tensions.