Police aren't giving details of exactly what happened in what they call a use-of-force incident, but they say the prisoner had to be taken to hospital for treatment and the Vancouver police have been asked to review the case.
It's not the first time a prisoner has been injured at the Victoria city jail.
A man was left with permanent brain injuries when an officer slammed him onto a concrete floor in 2004.
An adjudicator ruled the actions of Const. Greg Smith in that case violated the B.C. Police Act code of conduct and his training, and recommended a three-day suspension.
And Willow Kinloch, who was 15 when she was arrested for public drunkenness, sued and reached an out-of-court settlement with police last year after she spent four hours tethered to the cell door.
