BBC News -- Twenty people are reported to have been killed when prisoners broke out of a military prison in the eastern Ethiopian town of Kebri Dehar.
At least 34 prisoners are said to have escaped after subduing prison guards and seizing their rifles.
The BBC's Mohammed Adow in Ethiopia said the town became a battleground as soldiers pursued the fleeing prisoners.
They are from ONLF rebel group which is fighting against the government in the ethnic Somali region of Ethiopia.
The Ogaden National Liberation Front members had been held for five months at a jail in a military camp.
Eyewitnesses says soldiers carried out house-to-house searches in a village in their hunt for the prisoners, killing three of them hiding out in one of the houses.