- Many of those who died were vulnerable - from disadvantaged backgrounds or experiencing mental health and addiction problems, the report found.
- Victims were said to be placed in prisons with unsafe environments and cells
- The penal system failed to differentiate between adults and young adults within the system, the report added.
- There was a failure in communication between prisons and community agencies, campaigners said.
More top news
The World Health Organization said postponing the 2016 Games would not 'significantly alter' the spread of the Zika outbreak.
Employment Minister Priti Patel has launched a scathing attack on the government's 'chaotic' immigration controls.
Hanako died peacefully in a Tokyo zoo after living alone for 67 years.