Newly obtained documents reveal a culture of mistreatment and abuse in Australian juvenile detention centres that the government should urgently investigate, Amnesty International said Thursday.

The human rights organization said it had uncovered over 1,000 pages of documents that included incidents at two centres in the northern state of Queensland between 2010 and 2015.

Among the incidents cited by Amnesty include staff members putting child detainees in prolonged solitary confinement, deploying a security dog on children threatening suicide and conducting partial strip searches using humiliating methods.

The cases demonstrated the failure of care for vulnerable children, and the lack of accountability in the detention system, it said.

The report also revealed there were at least 31 suicide attempts by children who tied "ligatures around their necks" at one centre.

The organization alleged that "the problem is systemic and goes beyond politics." Amnesty International obtained the reports by the Queensland government's youth detention inspectorate under right to information laws.

Roxanne Moore, a rights campaigner at Amnesty International, said the incidents primarily involved Aboriginal and Torres Strait Islander children, because they were "massively over-represented in Queensland justice system."

"In fact, on an average day, 89 per cent of kids in Cleveland Youth Detention Centre are indigenous, despite being only 8 per cent of the youth population of Queensland," she told dpa, adding that indigenous children were 22 times more likely to be detained than non-indigenous in the Australian state.

Last month, local broadcaster ABC uncovered systemic abuse and mistreatment of children in a Northern Territory jail, with graphic footage showing boys between 14 and 17 years old in the prison being sprayed with tear gas in their cells, strapped to chairs with hoods over their heads and being beaten by guards.

The revelation forced Prime Minister Malcolm Turnbull to launch an official investigation. But he rejected calls to expand the inquiry to other juvenile centres, saying state governments should hold separate enquiries into their own detention systems.

"We have seen this abuse in the Northern Territory, now we are seeing it in Queensland - we know it happens all over Australia," Moore said on Thursday.

"The abuse is systemic, and that is why the system needs to change."

She said the federal government needs to appoint independent inspectors with access to detention centres around Australia, But, she added, "Governments at all levels must also work to keep children out of the justice system by addressing social problems through methods of prevention and rehabilitation, rather than punishment."

Latest news

Syrian opposition rules out future role for President al-Assad

The Syrian opposition said Friday it would not accept any role for President Bashar al-Assad in the future of the war-torn country, reacting to a recent US shift saying that removing al-Assad is no longer a priority for Washington.

Russian Army integrates breakaway forces of Georgian province

Parts of the small fighting forces of the Georgian breakaway province of South Ossetia have been placed under Russian military control, Russian Defence Minister Sergei Shoigu said on Friday.

Czech Republic's Pilsner Urquell beer is now Japanese

Japanese brewing company Asahi completed its takeover of the Czech brewery Pilsner Urquell on Friday, Asahi said in a statement.

Judge approves 25-million-dollar settlement of Trump University case

A US district judge on Friday approved a 25-million-dollar settlement of lawsuits and state fraud allegations against Trump University, the US president's now-defunct business venture.

Former Thai premier Thaksin to junta on reconciliation: 'Cut me out'

Former Thai prime minister Thaksin Shinawatra on Friday announced that he is not interested in the junta-led reconciliation process, three days after the junta handed him a half-a-billion-dollar tax bill for his past business deal.

Dalic: We welcome possible deal between Agrokor and banks

The government welcomes the possibility of an agreement being concluded between the Agrokor food company and creditor banks, and the bill on vitally important companies is not a fallback plan but the result of the government's care for the overall economic and financial stability of Croatia, Deputy Prime Minister and Minister of Economy Martina Dalic told a press conference in Zagreb on Friday.

Croatia, China sign action plan for cooperation in agriculture

The Croatian and Chinese ministries of agriculture on Friday signed an action plan for cooperation in the field of agriculture for the period 2017-2018, the Croatian ministry said in a statement.

ZSE indices up, Agrokor shares in focus of investor interest

The Zagreb Stock Exchange (ZSE) indices on Friday rose by more than 1.8%, with stocks of the Agrokor food and retail concern being in the focus of investor interest again.

Berlin police defend handling of Berlin market attacker

Berlin police defended themselves on Friday against accusations that they stopped surveillance on Berlin Christmas market attacker despite knowing in June 2016 he was dangerous.

Croatia, creditors tailor emergency measures to save tottering giant

Croatia's tottering retail and food giant Agrokor reached an agreement with its creditors, putting its debts standby and allowing it to continue working during emergency restructuring, the Croatian branch of Austria's Erste Bank said Friday.

Agrokor's creditors say standstill agreement to go into force today

A standstill agreement regarding the Agrokor concern's existing financial obligations to banks will take effect on Friday, additional capital will be injected into the concern in the coming days and the concern will be actively restructured, which includes a change of its management, it was said on Friday after a meeting between Agrokor's suppliers and creditor banks.

Palestinians, UN slam Israel's new settlement plan

Palestinians, Israeli activists and the UN lambasted the government of Israeli Prime Minister Benjamin Netanyahu on Friday, a day after it gave the go-ahead for the first new West Bank settlement in a quarter of a century.

South Sudan rebels release three abducted foreign oil workers

South Sudanese rebels have released three foreign engineers they abducted in early March in the oil-rich Upper Nile region, Foreign Affairs Ministry official Mawein Makol Arik said on Friday.

Turkish opposition: Imprisoned party chief has gone on hunger strike

The head of Turkey's pro-Kurdish opposition party has launched a hunger strike from prison.

European leagues threaten Champions League schedule clashes

The European Professional Football Leagues (EPFL) on Friday threatened schedule clashes on Champions League matchdays in an ongoing dispute with the governing body UEFA.

Danish court revokes citizenship of IS volunteer

A Danish appellate court on Friday stripped a man of his Danish citizenship for volunteering to fight for the extremist Islamic State in Syria.

Banks and Agrokor agree on key elements of standstill agreement

Member banks of the coordinating committee of financial creditors and representatives of the Agrokor food company have in principle agreed on key elements of a standstill agreement, which is expected to be signed later today, announcing changes in the company's management team, Erste Bank said in a statement on Friday afternoon.

Syrian man on trial in Sweden; mosque attack labelled terrorism

A Syrian man went on trial Friday in the southern Swedish city of Malmo, charged with terrorism and arson after an attack last year on a building used as an assembly hall by Shiite Muslims.