Authorities regain control of Banksia Hill after dozens of detainees riot and try to escape

Premier Mark McGowan said the behaviour of the youths was a form of terrorism" but advocates are concerned about the treatment of young people in the facility

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Authorities have regained control at Perth's Banksia Hill Detention Centre after dozens of rioting juveniles allegedly burned buildings, threatened staff and tried to escape the troubled facility.

The major disturbance started after a number of detainees breached their cells about 8.30pm on Tuesday and gained access to the grounds of the centre before climbing onto the roof.