At least seven officers with the Memphis Police Department were disciplined following the violent Jan. 7 arrest of Tyre Nichols, the department said on Monday.

The identities of six of the officers are known. Police did not disclose the name of the seventh officer, who was suspended on Jan. 8, or describe the officers role in Nichols arrest.

Another officer, Preston Hemphill, has been suspended pending an ongoing investigation, police confirmed to HuffPost on Monday. Hemphill was recorded using a stun gun on Nichols, a 29-year-old Black man who died three days after Memphis police beat him at a traffic stop.

Hemphill was relieved of duty but has not been fired from the department, MPD spokesperson Kimberly Elder said.