The pair of individuals, who are being repatriated to Pakistan, have been identified as Abdul Rabbani and Mohammad Rabbani. The review board determined their detention was no longer necessary on May 13, 2021 and August 17, 2021, respectively.
The Rabbani brothers were in US custody for nearly 20 years and never charged with a crime.
A release issued by the Pentagon noted it was not until January 18, 2023 that Congress was notified by US Defense Secretary Lloyd Austin of the agency's intention to repatriate both detainees.
The New York Times, citing two officials, said they were arrested for allegedly operating a terrorist safe house in the wake of 9/11.
The pair arrived to the detention center, located on the coast of Guantanamo Bay in Cuba, after being kept at a CIA-run black site in Afghanistan for 1.5 years, the report added. Described in US intelligence files as Pakistani nationals, the brothers were actually born and raised in Saudi Arabia and are ethnically Rohingya.
The Pentagon said of the 32 detainees remaining, 18 are eligible for transfer, 12 are in the review or military commission process, and two have been convicted.