FOURTEEN security staff at an NHS hospital were arrested after being accused of “roughing up” members of the public.
Workers were said to have shared CCTV footage of them being aggressive and “using force”.
The team were then accused of wiping the film from recordings at Croydon University Hospital.
Bosses at ICT Secure have suspended the 14 workers at the site in Thornton Heath, South London.
A probe insider called the claims shocking and harrowing.
Croydon Health Services NHS Trust has appointed an interim security team and is “co-operating fully with this investigation”.
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Health regulator the Care Quality Commission is assisting the probe.
ICT Secure refused to comment.
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Croydon University Hospital, known as Mayday Hospital until 2002, boasts a new £21m 24-hour accident and emergency department on its 19-acre site.
The hub includes 670 beds, eight operating theatres, a day surgery suite with three theatres, two obstetric theatres and recovery room, and overnight facilities for parents.