The Norfolk County District Attorney’s office has identified the three men who recently died within a one-month span while incarcerated at the Massachusetts Correctional Institution at Norfolk.

Their identities, released Thursday, are:

Christopher Stiles, age 36, who died on Sept. 20

Robert McNickles, age 73, who died on Sept. 27

John Rodriguez, age 65, who died on Oct. 20

The three deaths at MCI-Norfolk — the state’s largest medium-security prison housing men serving criminal sentences — are in addition to two others that also occurred over the last month or so at Souza-Baranowski Correctional Center in Lancaster, a maximum-security prison.

Joseph Eaton, 36, was identified Wednesday by the Worcester County District Attorney’s Office as the man who died at Souza-Baranowski on

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