The state Department of Corrections says 44-year-old Rony Martinez-Pereyra was working on the department's grounds when he fled around 10:00 a.m. on Thursday.
Martinez-Peraya received a three-year sentence for drug and gun charges.
Authorities say he has tribal tattoos on his right arm and "Crystal'' tattooed on his left arm.
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State police and the Office of Inspections are investigating. Anyone with any information on his whereabouts is asked to call state police detectives.
Further details weren't immediately available.