BOSTON (CBS) – Convicted killer and former Patriots star Aaron Hernandez has been taken out of the prison’s general population.

WBZ sources say a knife was found in his cell at the Souza Baranowski correctional facility in Shirley.

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According to ESPN, guards found a prison-made shank during a shakedown when checking Hernandez’s cell.

There is no word yet on any possible punishment.

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This is not the first incident Hernandez has had since being incarcerated.

In 2014 he was indicted in an alleged jail assault after getting in an altercation with another inmate.

The former NFL-er is scheduled to go to another trial for a 2012 double murder case in Boston in January.

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Hernandez is serving a life sentence for the murder of Odin Lloyd and faces additional murder charges for the deaths of two men in the South End.