At least 118 inmates escaped from prison after heavy rain damaged the facility
The unrest followed a mass rally last week marking the return to Ethiopia of the leadership of the exiled Oromo Liberation Front (OLF) group, which had fought an insurgency for self-determination for Oromos, Ethiopia's largest ethnic group.
The incidents are the latest in a spate of attacks carried out along ethnic lines since reformist Prime Minister Abiy Ahmed Ali came to power in April, the first Oromo leader in the ethnically diverse country's modern history.