TUCSON, Ariz. — Authorities say an inmate is dead at a federal penitentiary in Tucson and suicide is suspected.

Prison officials say 28-year-old Frank Marshall was found unresponsive by U.S. Penitentiary staff around 6:40 p.m. Wednesday.

The Arizona Daily Star reports that further staff assistance was immediately called in to perform life saving measures, but it was unsuccessful.

Other details weren’t immediately available Thursday.

Information from: Arizona Daily Star, http://www.tucson.com

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