CAMP HILL, Pa. (AP) — Officials say an inmate at a Pennsylvania state prison injured two guards in an attack, including one guard whose fingertip was bitten off.

Prison officials at Camp Hill State Correctional Institute confirmed an “inmate-on-staff assault” occurred Saturday, resulting in two officers being treated at a hospital.

PennLive.com reports prison officials would not release any information about the guards’ injuries, but a state police spokeswoman said one guard lost the tip of a finger.

A prison employee posted a photo of a bloodied finger on Facebook on Sunday morning. They said the incident took place where inmates line up to receive medication.

Prison spokeswoman Deb Alvord says the inmate was transferred to a “restricted unit” in a different state prison.

She would not release any additional information.