MARTINEZ (CBS SF) — An inmate was pronounced dead while in custody Tuesday morning at the Martinez Detention Facility, according to the Contra Costa County Sheriff’s Office.

Just before 7:45 a.m., a deputy found the man hanging in a shower.

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He was unresponsive, and life-saving efforts by medical staff and firefighters responding to the jail were unsuccessful.

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His name is being withheld pending notification of his next of kin.

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The death is under investigation by the sheriff’s office and the county’s district attorney.