Bishopville, SC (WLTX) - Seven inmates were killed and 17 injured following an incident at Lee Correctional Sunday night.

The South Carolina Department of Corrections says the incident started at 7:15 p.m. on Sunday and it involved multiple inmate on inmate altercations in three housing units. Multiple agencies responded to the incident.

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SCDC says the prison was secured at 2:55 a.m.

SLED is investigating the incident.

The SCDC says no staff members or officers were injured.

The Lee County Fire Department tweeted out photos of multiple crews at Lee Correctional.

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At 11:46 p.m., SCDC confirmed on twitter that they, along with the State law Enforcement Division (SLED) are responding to an ongoing situation at the facility.

While no other details are immediately available, Lee County Sheriff Daniel Simon confirms deputies are assisting SCDOC in its response at the maximum security prison.

The prison is located in the Town of Bishopville in Lee County, and is a Level 3 facility, meaning it houses some of the most violent offenders in the South Carolina prison system.