Suffolk Warren Hill's 'very high' violence figures
A Suffolk young offenders institution needs to do more to tackle a "very high" number of violent incidents, the chief inspector of prisons has said.
Warren Hill was inspected in March and found to have made progress since its last inspection in 2011.
But inspectors said assaults were an issue, with five inmates requiring hospital treatment in the past year and 10 others sustaining multiple injuries.
Chief inspector Nick Hardwick said: "More needs to be done to reduce it."
Two years ago, thousands of pounds of damage was caused during a mutiny at Warren Hill, when about 50 prisoners refused to return to their cells.
The governor and management team were praised by inspectors for "sustaining" improvements made since then and for "understanding young people and their needs".
A new reception and first night accommodation were deemed "excellent" and gang culture was being tackled.
Inmates were given an adequate time unlocked and most were engaged with some form of training or education, the report said.
"Overall this is a good report," Mr Hardwick said.
"It is an institution subject to considerable scrutiny and significant risk, and yet those risks were managed in a confident, proportionate and considered way."
Warren Hill can house up to 192 offenders at a time.