The man, whose name was not immediately made public pending notification of next of kin, was found unresponsive in his cell as correctional officers were conducting a cell check in the early morning, according to the Solano County Sheriff’s Office.

The officers attempted life-saving measures, but were unsuccessful, a brief message on the sheriff’s Facebook page stated.

Detectives from the sheriff’s office and the Solano County District Attorney’s Office are investigating.

No further details were released before press time.