The attack happened in the gymnasium of MCI-Shirley around 2:15 p.m. on Wednesday, Aug. 31, a spokesperson with the Department of Correction told Daily Voice.
The inmate was immediately detained by other staff and later removed from the general population, the spokesperson said. The officer, who was rendered unconscious, was taken to a local hospital for treatment.
The inmate will also complete an internal discipline process, the spokesperson said. The Middlesex District Attorney's Office has been informed about the attack, which remains under investigation.
Click here to follow Daily Voice Cambridge and receive free news updates.