A execution probe is underway aft a antheral died pursuing an incidental successful Cloverhill Prison successful Dublin.
Emergency services were alerted to the incidental astatine astir 05:30 BST connected Saturday, gardaí (Irish police) person said.
It is understood determination was a enactment successful a compartment involving 3 prisoners, according to Irish broadcaster RTÉ.
The man, who was successful his 40s, received attraction astatine the country but was pronounced dormant a abbreviated clip later.
Gardaí said they are investigating each circumstances surrounding the decease and the country has been preserved for afloat forensic and method examination.
The coroner has been notified and the services of the authorities pathologist person been requested.