Three prison inmates are accused of attacking and killing a 24-year-old Los Angeles man at Kern Valley State Prison last month, according to the California Department of Corrections and Rehabilitation.

Officials say three inmates allegedly attacked Dwight Gibbs, a 24-year-old incarcerated man, at about 8:06 p.m. on June 28. Prison employees quickly broke up the attack, but Gibbs was treated for his injuries and transported to a local hospital, where he died about one hour later.

Gibbs was serving a 41 year sentence for attempted second-degree murder as a second striker with enhancements of inflicting great bodily injury and use of a firearm. He was incarcerated at Kern Valley in January 2023.

Three men — 55-year-old Michael Brown, 63-year-old Jerry Dunham and 61-year-old Rex Dickey — were each placed in restricted housing. Their fates will await completion of a homicide investigation.

Officers found three prison-made weapons at the scene of the attack.

Brown was convicted on first-degree murder charges in 1997. Both Dunham and Dickey have been convicted for assault as inmates.

There was no immediate word on a possible motive.