Fifteen staff members have been placed on administrative leave pending an investigation into Saturday’s death of New York prison inmate Messiah Nantwi, New York Governor Kathy Hochul said in a release on Tuesday.

Eleven corrections workers were placed on leave after a 22-year-old inmate at Mid-State Correctional Facility died. Inmates said he was viciously beaten by prison guards.

The State Police said Monday they have opened an investigation into the death of a man in an upstate prison following a reported altercation Saturday with correction officers as the now