A prison guard has been taken to hospital with injuries suffered in an assault by an inmate at Hawke's Bay Regional Prison.
Corrections said the officer received bruising and swelling to his head and face in the assault by the prisoner on remand yesterday.
Police have launched an investigation into the incident.
Acting prison manager Yvonne Fuller said the inmate who carried out the assault is due to appear in court in the coming weeks.
Identifying him would prejudice future judicial processes, she said.