There were 150 recorded assaults on prisoners in Magilligan over the past three years.
Jails Minister David Ford said: “All prisoners, following an assault, receive medical treatment from South Eastern Health and Social Care Trust (SEHSCT) staff. If a prisoner then requires further treatment at an outside hospital this is a decision for the SEHSCT.”
The number of assaults reduced form 69 in 2013, to 44 in 2014 and further to 37 last year.
The Minister said the information provided was taken from the Prison Records Information System