Inspectors investigating an incident at Helston theme park Flambards have said three people were injured on one of the rides.
Further details have now been made public about the incident, which took place on the Space Race ride at around 11.45am on Tuesday.
Reports from people locally suggest that one of the carriages came off the track, although this has not been confirmed officially.
The Health and Safety Executive (HSE) is now carrying out an investigation into the incident at the theme park in Cornwall, saying three people suffered injuries on a ride and attended hospital as a result. Initially it had been thought only one person was injured.
An HSE spokesperson said that inspectors were making enquiries into what happened and the ride remains closed to the public at this time.
They are said to be working with the park's specialist engineers.
Simon Chilcott, HSE principal inspector, said: “While incidents at theme parks are relatively rare, we are now gathering information to ascertain what happened.”
A spokesperson for Flambards said on Wednesday: "At 11.45am [Tuesday] morning there was an incident at Flambards Theme Park in one of the carriages of our undercover ride Space Race, which caused the ride operator to perform an emergency stop.
"One adult attended Royal Cornwall Hospital in Truro to receive treatment.
"The park specialist engineers are carrying out a full investigation in conjunction with the Health and Safety Executive, to establish the cause of the incident.
"The health and safety of our visitors and staff is our top priority and as a result the Space Race ride will remain closed until a full investigation has taken place."
The website describes the Space Race ride as "A simply fantastic spinning ride – the Space Race will transport you into darkness where you will reach dizzying speeds through the unknown."
The Health and Safety Executive (HSE) is Britain’s national regulator for workplace health and safety, to prevent work-related death, injury and ill health.
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