A prisoner from Mount Eden jail is in hospital under guard after becoming ill with Delta, and two others with the virus are in quarantine at the prison.
Corrections says all three of the prisoners were infected separately outside of the jail and there has been no spread within the facility.
It says prisons are following strict protocols with new arrivals essentially isolated in bubbles for the first 14 days before joining the general prison population, with both staff and prisoners supplied PPE.
There have been six Covid cases in our jails since the pandemic started and right now about 65 percent of inmates across the country have had their first Pfizer shot.
Corrections Chief Custodial Officer, Neil Beales explains what's happening with the three infected inmates.
At level 3, prisoners cannot have face to face visitors. Work-to-release programmes and face to face rehab programmes are suspended.
