The Human Rights Commission of Sri Lanka has commenced an investigation into the incident that took place at the Kandakadu Treatment and Rehabilitation Centre on Tuesday.
Accordingly, a team of the Commission visited the Centre yesterday to conduct investigations.
Meanwhile, the police have re-arrested 600 detainees who escaped from the facility after clashing with the security personnel.
A number of escapees have been placed in remand custody while others are being held at the Polonnaruwa, Medirigiriya, Bakamuna and Minneriya Police stations to be produced before court.