A Fremont man died Saturday while in custody of Massachusetts State Police.

The 49-year-old man was stopped on Route 99 in Saugus around 2:30 a.m. and charged with operating under the influence of drugs, possession of a Class B narcotic, and speeding. He was placed in a cell at the State Police barracks in Danvers.

During a "face-to-face check" conducted every 30 minutes, the man was found unresponsive in his cell around 11:30 a.m., according to State Police.  The checks are conducted on all prisoners per State Police policy.

Troopers called Danvers Fire and EMS, who were unsuccessful in their attempts to revive the man. He was pronounced dead and taken to the medical examiner's office.

State Police did not disclose the identity of the man.

The man's death is under investigation by the Essex County District Attorney’s Office. State Police will also conduct an administrative review of the incident.

Contact reporter Dan Alexander at Dan.Alexander@townsquaremedia.com or via Twitter @DanAlexanderNH

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