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RIDGEVILLE, S.C. (AP) -- A prison that's home to South Carolina's death row is on lockdown while authorities wrap up an internal investigation.

Department of Corrections officials say Lieber Correctional Institution will stay locked down until Monday. Department spokesman Clark Newsom would not give details, only saying that there had been a "security related issue" at the maximum security prison but that no riot had happened.

During lockdown, Lieber's 1,410 inmates are restricted to their cells.

The prison near Ridgeville was locked down in January after a fight in which at least two corrections officers were injured and authorities had to use tear gas to restore order. Officials say inmates overpowered the guards and took their keys and a radio.

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