Police and Oranga Tamariki staff are dealing with an incident occurring at Te Puna Wai o Tuhinapo youth justice facility near Christchurch.
Late this morning, five young people left their unit and accessed a roof area in the facility.
A staff member suffered minor injuries during this incident and is being cared for at Christchurch Hospital.
Police and Fire and Emergency NZ are on-site and helping staff resolve the incident, an Oranga Tamariki spokesperson told the Herald.