The Abolongo Correctional Centre in Oyo town in Oyo State was on Friday invaded by gunmen.
It was gathered that the gunmen attacked the facility with explosives around 10.30pm and set the inmates free.
A search by security operatives for the fleeing inmates has begun.
The Public Relations Officer of the Oyo State Command of Nigerian Correctional Services, Lanre Anjonrin, confirmed the attack, saying, “I am there now and we are assessing the level of damage done. We will make our findings known later.”