Police are investigating the death of a prisoner at a Victorian medium security jail.
Underworld figure Hizir Ferman, 35, collapsed after being forcibly removed from his room in Loddon Prison on Thursday, Corrections Victoria said.
Earlier he had attacked two guards, with the Middleton Annex put in lockdown.
Ferman has been linked with numerous Melbourne gangland figures.
Police are still investigating the cause of death and will prepare a report for the coroner.
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The two guards who were attacked were taken to hospital with minor injuries.
