MARTINEZ (KRON) — An inmate has died at the Martinez Detention Facility, Contra Costa County sheriff’s officials said Thursday morning.

The inmate died while in custody at the facility, according to a tweet sent out at 8:13 a.m. by a Contra Costa County sheriff official.

The jail is located at 1000 Ward St.

The cause of death is unknown at this time.Stay with KRON4 News for updates.