Gunmen freed more than 260 inmates during an attack on a prison in Jos Plateau State, officials said, in the country’s fourth such raid this year.
The attackers opened fire on guards on Sunday evening, starting a gunbattle that left one guard and nine prisoners dead, the correctional service said.
No one immediately claimed responsibility for the raid in the capital of Plateau State. Regions further north have been plagued by bandits and Islamist militants.
“Some of the attackers and a total of 262 inmates escaped in the melee before reinforcement could come from sister services,” the service said in a statement.
In a stop-and-search operation launched after the attack, 10 of the escapees have returned to the facility, but while nine of them were recaptured, one was said to have willingly returned.
The gunmen also escaped with their members in custody, sources said.
It was learnt that at the time of the attack, the Jos Medium Security Custodial Centre had 1,060 inmates comprising 560 pre-trial detainees and 500 convicts.
Last month, gunmen attacked a jail in Oyo State and freed more than 800 inmates.