Officials at the Adams County Correctional Center say cleanup is complete but the facility remains on lock-down following the May 20 prison riot in which one guard died and 16 other prison employees were injured.
FBI spokeswoman Deborah Madden said the federal investigation into the riot continues.
Correctional Center spokeswoman Emilee Beach told The Natchez Democrat that FBI officials are no longer on-site at the prison.
Madden said prison management is cooperating with the ongoing investigation.
During the riot, an inmate called a news station and said the violence was in retaliation for poor treatment. Later, Adams County Sheriff Chuck Mayfield said it was caused by gang violence that
spread as mass hysteria took over the prison.
Since the riot, 10 employees have left their jobs there.