Ethiopian police have uncovered a mass grave with an estimated 200 bodies in the area between Oromia and Somali regions, according to the state media.
Fana Broadcasting Corporation said Thursday that the grave was found during an atrocities investigation allegedly carried out by a paramilitary force known as the "Liyu Police," which was considered loyal to Abdi Mohammed Omer, former President of Somalia.
Adbi was forced to resign on August 6th, and later was arrested after the outbreak of fighting in the capital of the province of Jigjig and the surrounding towns. He is now in custody for alleged violations of human rights.
According to Fany, the police were given 14 days to be discovered and judicially examined.
"If it turns out that these mass graves are related to a systematic attack on the local population, we will definitely look at the case of war crimes and crimes against humanity." Awol Allo, a lecturer at Keele University Law School and an Ethiopian expert, said Al Jazeera.
"The man in the middle of this theater can not wash his hands."
The region has been suppressed for decades by violence when the government fought the Art Nouveau Ogaden National Liberation Front (ONLF) before the two sides signed a peace treaty last month.
Human rights groups often blame Abdi's former administration for human rights violations.
In July, US Human Rights Watch (HRW) claims that Abdi operated a secret prison where the suspected members of the ONLF were tortured.
In a letter to the African Commission on Human Rights and the Rights of the Nations, HRW said that it documented cases of abuse, rape and humiliation Central Prison in Jigjiga, which directly participated in Liyu Police.
Awol said the unofficial militia "was directly responsible and loyal to him (Abdi) long before he became president – after he became president, he was absolutely in control."
In August, Ethiopian officials said Liyu police carried out an attack that killed 41 people and injured another twenty.
"Responsibility for Victims"
When ethnic Somali and Oroma clashed over land and resource claims in border areas in the previous months,there were supposedly killed another hundred others.
Since taking office in April, Prime Minister Abi Ahmed has overseen a series of reforms and has sought a friendly strategy that drives the state from a tough security policy that has existed for decades.
However, Abiy's steps must stop ethnic-motivated violence, considered to be the biggest domestic challenge of the new Prime Minister.
Awol noted that the appointment of Mustaf Omer, the human rights activist who lived in exile as acting President of Somalia, was a step in the right direction.
"In the center, the federal government is taking radical steps to transform the political landscape, but it is important that responsibility for the human rights victim becomes part of this transformation."
Al Jazeera and the news agency