Correctional officers stopped 10 detainees from attacking two others at Sai Kung’s maximum security Pik Uk Correctional Institution on Sunday, with all those involved being held in custody ahead of court hearings.

At around 1.13pm, 10 remand prisoners, aged between 17 and 20, attacked two 19-year-old remand prisoners, the government said in a statement late on Sunday evening.

“During the incident, a victim sustained injuries to his head and hand. After examination and treatment by an institution Medical Officer, he was referred to a public hospital for further treatment,” the statement said. “Another victim did not sustain any injuries. Two assailants sustained injuries to their knee and foot respectively.”

It added that the other assailants did not sustain any injuries, and the case had been reported to the police.

The 12 detainees are being held in custody over alleged offences including the manufacture of a dangerous drug, trafficking in a dangerous drug, possession of a dangerous drug, burglary and wounding with intent.

The statement did not say what caused the brawl.