BOISE - An inmate armed with a padlock wrapped in a T-shirt injured three correctional officers and another inmate Thursday morning at the maximum security prison south of Boise, the Idaho Department of Correction said.

The incident happened at about 9:30 a.m. in a recreation area of the Idaho Maximum Security Institution. Officials said the officers were hurt when they tried to stop an inmate-on-inmate assault.

Two of the officers and the inmate who was assaulted suffered serious injuries and were taken to a Boise hospital by ambulance. The third officer was taken to the hospital in a state vehicle.

None of the injuries are believed to be life threatening.

Officials said the inmate responsible for the assault is 32-year-old Clark Jackson Cleveland, who is serving a life sentence with no chance for parole.

Cleveland’s criminal record includes convictions in Twin Falls County for aggravated assault, second-degree kidnapping and first-degree murder.

He was also convicted of aggravated battery for assaulting another inmate last year.

The Ada County Sheriff’s Office is investigating Thursday's attack.

The prison has canceled all inmate visiting sessions through Sunday.