A prison officer has died after an attack by an inmate at Minnesota Correctional Facility-Stillwater on Thursday.
Joseph Gomm, who has been with the Department of Corrections for 16 years, was attacked at 1:30 p.m. at the Stillwater prison.
He was rushed to Regions Hospital, but was pronounced dead.
The attack happened in the industry building, with his attacker currently serving time for homicide.
"Joseph gave the ultimate sacrifice while working to protect the citizens of Minnesota," the DOC said. "He had been with us for 16 years."
In a statement before media on Wednesday evening, corrections commissioner Tom Roy said all of the state's prisons are on lockdown as a precaution after the attack.
"I've had some tough days in this career, we have lost staff to suicide, we have lost staff to accidents, it is a tough day to lose people," he said.
Gov. Mark Dayton said he is "appalled" by Gomm's killing, offering his "deepest sympathies" to his family, friends and colleagues.
"We are all indebted to the courageous Corrections Officers and other state employees, who risk their safety in Minnesota's prisons to ensure the safety of their colleagues, our communities, and the inmates themselves. Minnesotans are grateful for your selfless service, and we mourn with you the loss of your colleague and friend."
There have been several cases of prison officers being injured at the hands of inmates at Minnesota prisons this year. Just last month, a sergeant was attacked and seriously injured at MCF-Oak Park Heights, causing the prison to go on lockdown.
And in March, another officer was injured at MCF-Stillwater, just days after 10 officers were injured at MCF-Oak Park Heights in