Four men have been arrested on suspicion of child neglect by police investigating allegations of abuse and mistreatment of youngsters at a facility run by private security group G4S.
Kent Police detained the four men on Wednesday following allegations aired on the BBC's Panorama programme this week.
Undercover footage showed staff allegedly mistreating and abusing inmates at Medway Secure Training Centre in Rochester, and allegedly boasting about using inappropriate techniques to restrain youngsters.