Police say 25-year-old Ruben Porter is accused of stabbing a 22-year-old prison guard twice with a homemade shank Tuesday night in a maximum security unit at the prison in Smyrna, which remained on lockdown Wednesday.
Porter also is accused assaulting a 53-year-old guard, who was treated for a facial injury.
Authorities say the injuries suffered by the guard who was stabbed are not considered life threatening. He was flown to Christiana Hospital in Newark for surgery and was reported in good condition.
Porter is serving time for attempted robbery, assault, possession of a deadly weapon by a person prohibited and possession of a firearm during the commission of a felony.
