SYDNEY, Australia — Indigenous children in the Australian state of Queensland are much likelier than others there to be held in juvenile detention, and Australia’s judicial system has held children as young as 10 criminally responsible for their actions, Amnesty International said in a report released on Wednesday.

The report is the latest critical assessment of juvenile detention in Australia, after a news investigation in July by the Australian Broadcasting Corporation on conditions in the Northern Territory, which adjoins Queensland. That report found that juvenile inmates, predominantly Aboriginal children, had been strapped into restraining chairs, forced to wear hoods and sprayed with tear gas. Prime Minister Malcolm Turnbull announced an official investigation in response.

Image A still image taken from the Australian news program “Four Corners” is said to show a teenage boy hooded and strapped into a chair at a youth detention center near the Northern Territory city of Darwin. Credit... Four Corners/European Pressphoto Agency

Amnesty International’s report on Wednesday said that while just 8 percent of children in Queensland are indigenous — that is, Aboriginal Australians or members of the Torres Strait Islanders ethnic group — they make up 65 percent of juveniles in detention. Queensland has more 10- and 11-year-old children in detention than any other Australian state, the report said.