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On 23 January 2026, the Committee Against Torture of the United Nations (CAT) published its decision in the Communication No. 1079/2021 submitted by A.A. against Australia. The communication concerns the lawfulness of prolonged detention in Australia and at the Manus Regional Processing Centre in Papua New Guinea, and the possible accountability of Australia for alleged violations of the Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment (hereinafter, the Convention).

The complainant, an Iranian national, arrived in Australia in July 2013 and was transferred under a migration cooperation agreement to the Manus Detention Centre in Papua New Guinea, where he was subjected to harsh detention conditions and torture. He was temporarily returned to Australia in 2019 for medical treatment but remained detained administratively until 2022. The applicant claimed that his detention in both Australia and Papua New Guinea was inhuman and degrading and caused him severe physical and mental suffering.

The Committee found that the complainant suffered torture and inhuman treatment while detained at the Manus Regional Processing Centre in Papua New Guinea. Although these acts occurred outside Australian territory, the Committee noted that Australia exercised effective control over the detention system through its central role in designing the migration arrangements, providing full funding, and establishing the overall framework and operational structure of the centre. Even if direct operational control by Australian agents was absent, the Committee held that Australia remained responsible, reflecting both the principle of effective control and the doctrine of joint responsibility under international law. It further observed that Australia failed to take measures to prevent acts of torture, to investigate and punish abuses, and to ensure adequate medical care during his detention, hence constituting a violation of Article 2(1), read in conjunction with Article 1(1) of the Convention.

The Committee also found that the complainant’s administrative detention in Australia was not justified, necessary, or proportionate, and lacked adequate review, thereby amounting to inhuman and degrading treatment, in violation of Article 16(1) of the Convention.
Finally, the Committee recommended that Australia provide the complainant with redress, including compensation, rehabilitation, and guarantees of non-repetition, and take measures to prevent similar violations in the future.