Self-harm incidents are rare at Mt Eden, which has been under Serco's management but is currently being managed by the Department of Corrections after allegations of prisoner violence.
Between 2009 and May this year there were 115 self-harm incidents in New Zealand prisons.
Of the 35 unnatural deaths over the past five years - including murder, overdose and suicide - just one person has taken their own life while Mt Eden prison was privately managed.
There were five self-harm incidents of 115 nationally which took place under Serco's watch at Mt Eden. One death and a number of possible self-harm attempts are still being investigated.
Corrections conducts health screenings when offenders enter and are transferred between prisons. A mental health screening tool and suicide prevention framework has also been developed.
Where to get help:
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youth services: (06) 3555 906
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• The Word
• Depression helpline: 0800 111 757 (available 24/7)
• Rainbow Youth: (09) 376 4155
• CASPER Suicide Prevention
If it is an emergency and you feel like you or someone else is at risk, call 111.