Two Indigenous inmates were badly bashed in their cells at Canberra’s Alexander Maconochie Centre earlier this month.
Both men required hospitalisation after the incidents on August 7, a Justice and Community Safety Directorate confirmed.
One was treated and returned to jail the same day while the other was admitted to hospital overnight.
The centre is in the process of introducing major changes after an Indigenous inmate was severely bashed and was found dead in his cell a year later in 2016.
A review into the death found the police investigation was deficient and flawed due to a series of failings involving corrections, police and health authorities.
A spokesperson for the Justice and Community Safety Directorate says Corrective Services is working closely with police to assist their investigation.