ALLOUEZ, WI -- An investigation is underway tonight into the death of a Green Bay Correctional Institution inmate on the 4th of July.
The state Department of Corrections says Francisco Flores-Rocha's cause of death is unknown at this time.
Sources within the prison tell us he's the same inmate responsible for attacks on three employees last week.
Watch: Calls for better security after Green Bay Correctional institution attack:
The Allouez prison went into lockdown after an inmate stabbed two staff members and injured a third. All of the victims have been released from the hospital.
Flores-Rocha allegedly refused medical attention after cutting his hands during the attack.
Department of corrections spokespeople say they can't confirm or deny that Flores-Rocha was behind last week's stabbings, but promise more will be released with the investigation.
Right now, investigators with the Brown County Sheriff's Department say his death Monday does not seem suspicious.
Last week's attack also put the prison on temporary lockdown, and reignited a debate about staff safety within state prisons.
Flores-Rocha was serving a 20-year prison sentence for First Degree Attempted Homicide in Kenosha County.