An investigation into allegations of corruption by staff at Christchurch men's prison has found no evidence of such behaviour.
Serious allegations were raised last year by a staff member.
A report released on Thursday by the Department of Corrections, which investigated six issues, has cleared staff of any wrong-doing.
The allegations included a staff member having an inappropriate relationship with a prisoner.
It was also claimed another staff member was allowing gang members to carry out illegal activities including onselling alcohol such as whisky supplied by that officer.
Corrections says it takes every allegation of corrupt activity extremely seriously but its Professional Standards Unit found no evidence that would justify any formal action being taken against any individual staff member.
