The Abolongo Correctional Centre in Oyo town in Oyo State was on Friday night invaded by gunmen.
Sources said the gunmen attacked the facility with explosives around 10.30pm and set the inmates free.
Hundreds of prisoners at the facility were said to have been set free by the yet-to-be identified spokesman for the Nigerian Correctional Service (NCS) in the state, Olanrewaju Anjorin has confirmed.
He said a search by security operatives for the fleeing inmates had begun as top officials of the Service are assessing the situation.
He said the Service would make the findings known later.
This attack comes after a similar attack on Kogi Correctional centre on September 12 2021, by unknown gunmen who set free more than 200 inmates.
