The Ombudsman has slammed the Otago Corrections Facility for the "unacceptable" use of CCTV cameras in cells there.
Chief Ombudsman Peter Boshier said it was "completely inappropriate" that CCTV cameras covered showers and toilets in the prison.
"As a minimum, the men in the care of Otago Corrections Facility should be able to carry out their ablutions with some privacy," Boshier said.
Some of the prisoners affected were under the age of 18, he said.
Prisoners could be seen on CCTV while undressing, showering and going to the toilet.