Seven prison inmates were killed and 17 others were seriously wounded during an eight-hour-long riot in the state of South Carolina, the deadliest in the United States since 1993.
The violence began on Sunday at the Lee Correctional Institution, a maximum security prison in Bishopville, South Carolina, state officials said on Monday.
All seven deaths were the result of stabbing injuries with armed with improvised weapon and homemade knives, said Lee County Coroner Larry Logan.
It was the deadliest U.S. prison riot since 1993, when nine inmates and one corrections officer died at the Southern Ohio Correctional Facility in Lucasville, Ohio.
Precisely what may have sparked the violence was unknown.
The prison houses about 1,500 inmates, some of South Carolina’s most violent and longest-serving criminals.
The Unites States has the highest rate of incarceration in the world, with about 2.3 million individuals behind bars.