Two Rimutaka Prison guards have been taken to hospital after an assault.
Rimutaka deputy prison director Viv Whelan said three prisoners had allegedly attacked two staff members at the prison on Tuesday afternoon.
One of the staff members received medical treatment in hospital for a minor injury and had been discharged, she said.
“Police have been informed and are investigating the incident. We have a zero-tolerance to violence policy in prison.
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“Any violence or assaults towards staff or other prisoners will not be tolerated, and any prisoner who uses such behaviour will be held to account.”
Corrections Association president Alan Whitley said there was limited detail available about the incident, which he believed happened about 3pm at the Upper Hutt prison, north of Wellington.
“We don’t know the extent of the injuries yet. What we’re trying to ensure at the moment is that the staff are safe and looked after.”
Police said they had been advised of an incident, but referred questions to the Department of Corrections.
Two prisoners are also alleged to have attacked an officer at Auckland prison about 2pm on Tuesday.
There were no serious injuries to staff. One prisoner received treatment for injuries on site.
Whitley said he had been informed the two incidents were unrelated.