ITV News has learned that another seven staff at a hospital in south Wales have been suspended over claims of falsifying records.
Three workers from the Princess of Wales Hospital in Bridgend are already under arrest.
Families of patients say neglect at the hospital is as bad as at the now-infamous Mid Staffordshire Hospital Trust.
ITV News correspondent Rupert Evelyn reports:
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A rollercoaster has come off the rails at a theme park in Scotland, leaving nine children and two adults in hospital.
"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.