About 81 people were killed in Ethiopia after a popular singer's death sparked violent protests in the country's Oromia region.
So far as many as 88 people are thought to have died since protests following Haacaaluu's murder at his home in Ambo, a city 70 miles, (110km) outside the capital, Addis Ababa, on Monday. Since the protests began, three police officers and 78 civilians have been killed including Hachalu's uncle, the Oromia region police force said in a press conference on Wednesday.
Thousands of people gathered to pay their respects at the funeral of slain Ethiopian activist and artist Hachalu Hundessa on Thursday.
Only a small crowd of emotional family members and mourners were allowed to be present as the singer's casket was lowered into the ground next to a church in Ambo.
Oromo people are the largest ethnic group in the East African country, but have long complained of discrimination and rights violations.
Although Abiy has rolled out greater freedoms nationwide, parts of western and southern Oromiya are under federal military control, where Amnesty International has documented killings and abuses by security forces.
The arrest could spark tension with the Oromo ethnic group.
On Wednesday, Mr Abiy warned that those behind Hachalu's death wanted to derail his reform programme.
Ethiopian politician Jawar Mohammed has been arrested.
The singer had said that he had received death threats, but it is not clear who was behind his shooting on the outskirts of the capital, Addis Ababa.
Hachalu was more than just a singer and entertainer. But his new ruling party, based on a pan-Ethiopian vision, faces stiff competition from newly emboldened regional power brokers like Jawar determined to stake claims for their people after decades of repression.
The BBC Amharic also said at least two people were killed in Chiro town, in eastern Ethiopia of Oromia regional state.
His music gave voice to Oromos' widespread sense of economic and political marginalisation during years of anti-government protests that swept Prime Minister Abiy Ahmed to power in 2018.
These pictures taken from social media activities purportedly show protesters after they toppled down the statue of Ras Makonnen in Harar city.
The unrest, which prompted the government to switch off the internet in the capital, highlighted ethnic tensions that threaten to derail Ethiopia's fraught democratic transition, overseen by Prime Minister Abiy Ahmed, last year's Nobel Peace Prize laureate.
"He will remain in my heart and the hears of millions of Oromo people forever", she said, referring to Ethiopia's largest ethnic group.
This led to a demonstration in 2016 as pressure was mounted on the government.
His rule has ushered in greater political and economic freedoms in what had always been one of the continent's most repressive states, and he won the 2019 Nobel Peace Prize for ending conflict with neighboring Eritrea.