Young people held in Western Australia's notorious Banksia Hill Detention Centre have climbed on to the roof of the Canning Vale facility.

Reports indicate at least six of the children held at Banksia Hill are on the roof as of Monday afternoon.

Aerial footage shows the children removing vents and other articles from the roof and throwing the items towards guards below.

One of the children has set off a fire extinguisher. No injuries have been reported at this stage.

Banksia Hill is a maximum-security facility that holds boys and girls aged between 10 and 17.

A spokesperson for the WA Department of Justice told the ABC Corrective Services officers were "responding to an incident involving a group of young people".

"Officers are working to resolve the situation safely," a spokesperson said.

Aboriginal children are dramatically over-represented in Banksia Hill, and conditions within the centre have long been criticised widely by legal experts and Indigenous advocates.

A class action against the WA Government regarding Banksia Hill is underway involving some 500 individuals.

Megan Krakouer, who has played a key role in organising the legal action, told National Indigenous Times on Monday: "Let's be absolutely clear: children in Banksia Hill Detention Centre are still being mistreated, and their fundamental human rights are being violated every single day."

"The conditions remain dangerous, degrading, and completely unacceptable. The Government keeps insisting things have improved, but that is simply not what these young people are experiencing. The reality on the ground is one of ongoing isolation, excessive restraints, and an environment where self-harm is far too common," she said.

"What we need now isn't more political spin; it's transparency. The Government must release robust, comprehensive, and independently verified data on all critical incidents: every instance of self-harm or attempted self-harm, every use of force, every restraint, every lockdown hour, every so-called 'critical intervention'.

"For too long, these numbers have been buried, watered down, or delayed, and that lack of transparency has allowed ongoing harm to remain hidden from public scrutiny. And let's not forget the broader community: this is a massive waste of taxpayers' money without any concrete usefulness or positive outcomes. We are pouring public funds into a system that continues to fail children, fail families, and fail the community, all while pretending the crisis has been solved."

Ms Krakouer said children at risk won't be protected "if we refuse to face the truth".

"Banksia Hill is still in crisis, and until the Government is willing to confront the real data and deliver real reform, kids will continue to suffer behind those walls. They deserve dignity, safety, accountability, and a system that actually works," she said.

Current and former WA Inspectors of Custodial Services, and current and former WA Children's Courts Presidents, have slammed the facility.

In 2022, law professor and former Inspector of Custodial Services Neil Morgan and former WA Children's Court President Denis Reynolds were scathing of Banksia Hill and the then McGowan government's handling of youth justice.

Also in 2022, the Supreme Court condemned the excessive use of lockdowns in Banksia Hill as unlawful. The following year, Western Australia's Aboriginal Legal Service slammed the WA Government for the ongoing use of lockdowns in Banksia Hill despite the Supreme Court ruling.

In May, 2023, the Aboriginal Legal Service revealed the shocking details of 57 letters of complaint from children detained in Bankia Hill and Unit 18, describing physical and emotional abuse suffered at the hands of staff.

There have been several major disturbances at Banksia Hill in recent years, including riots in 2013, 2017, 2022 and 2023.

Update as of 6.45am Tuesday: A Department of Justice spokesperson said "Three detainees remain on the roof at Banksia Hill Detention Centre and staff are working to safely resolve the incident. There is damage to some parts of the education precinct and it is largely superficial. There have been no injuries to staff or detainees."

Update as of 7.44am Tuesday: "The incident at Banksia Hill Detention Centre is now resolved. All detainees are now down from the roof and safely in custody. There were no injuries to staff or detainees."