Nearly 30 inmates brawled inside a Saskatchewan prison, leaving one man dead, according to the institution's deputy warden.

The fight broke out Friday night in the Saskatchewan Penitentiary, located on the western edge of Prince Albert.

"The institution has been placed under a general lock-down," Deputy Warden Kathy Neil told CTV News. "An investigation is on-going."

Inmate Courtney Dallas Cook was killed in the violence. He was serving about a two-year sentence for dangerous operation of a motor vehicle causing death and failing to comply with a probation order.

"He died as a result of his injuries," said Neil.

Another seven inmates "required immediate medical attention" and were taken to hospital.

There were no staff injuries reported.

The prison is nearly a century old. It has a total of 532 inmates -- 503 of them are housed in medium-security units, and 166 in maximum-security.

The fight that ended in Cook's death took place in a medium-security unit.

With files from The Canadian Press