Seventeen maximum-security inmates assaulted three correctional officers with pepper spray and chairs before two more officers used tear gas to quell the 10-minute uprising Thursday night at a  Maryland prison, the state Division of Correction said in recently released reports.

Three officers, who remain unidentified for privacy reasons, were injured; one was in intensive care at Cumberland Memorial Hospital after surgery for a head injury, said Maj. Priscilla Doggett, a Division of Correction spokeswoman. The two other injured officers were treated for minor injuries, and one of them was treated for a possible arm fracture after what Doggett called “the inmate movement”.

Doggett said the inmates attacked the officers about 10 p.m. as the inmates were leaving a recreation room to return to their cells at the prison. The 256-bed prison was locked down Friday, and the inmates involved in the fight were in segregation pending completion of the investigation, Doggett said.

Doggett said the inmates threw chairs and floor-standing fans at the three officers in an attack that spilled from the recreation room into a hallway and stairwell. Doggett said they also pelted the officers with batteries from the officers' radios, which the inmates somehow had obtained. The inmates got at least one officer's can of pepper spray and used it on the officers, she said.