Four detainees from Ife Prison in Ile-Ife were killed by prison personnel while attempting to scale the barrier.
The incident, which occurred on Tuesday morning on the grounds of the jail in Kosere, along Ifewara road, apparently resulted in the injuries of a number of people who were also attempting to flee.
Other detainees reportedly went back to their cells.
The detainees had been preparing the escape for weeks, according to one jail official who spoke on the condition of anonymity.
At the time of filing this report, prison officials have positioned themselves in strategic places to prevent another escape.
Meanwhile, a top prison official in the prison told our reporter that four of the inmates lost their lives while the injured inmates are presently being attended to by the prison authorities.
When contacted, the Public Relations Officer of the Nigerian Correctional Services (NCoS) in the state, Mr Sola Adeotan, said he would get across to our reporter on the incident at a later time while hinting that prison boss in the state, Mr Amoran visited the scene in the afternoon on an assessment mission.