A theme park has said it is "deeply saddened" by the injury to a visitor who reportedly fell from a rollercoasrer.
Oakwood Theme Park in Pembrokeshire, south west Wales, was evacuated after a "serious" medical emergency.
The Welsh Ambulance Service was called to the scene at 1pm on Sunday, with an air ambulance also arriving at the park.
Oakwood Theme Park has now released a statement after he Health and Safety Executive (HSE) confirmed an incident happened on the Treetops rollercoaster in the park on Sunday (October 23) and inspectors are investigating the circumstances.
On Monday evening (October 24), a statement from Oakwood confirmed that one visitor sustained an injury following an incident that took place on its Treetops ride.
It said the park was co-operating fully with the HSE investigation and that the health, safety and wellbeing of its visitors and staff was of "paramount importance" to them.
In a statement, the spokesperson for Oakwood Theme Park said: "We are deeply saddened by the incident that took place on our Treetops ride on Sunday, October 23, in which one of our visitors sustained an injury.
"We are co-operating fully with the HSE investigation into the incident and are unable to comment further at this stage.
"The health, safety, and wellbeing of all our visitors and staff is of paramount importance to us. Following guidance from the HSE, Oakwood Theme Park will re-open for the half term holiday in Wales on Saturday 29th October as planned with Treetops remaining closed during the period of investigation. All guests affected by yesterday’s closure, will be contacted directly by a member of our team."
One eyewitness, who wished to remain anonymous, says he was among the first people on the ride but was told there would be a 10 minute wait as engineers were working on an issue.
"We waited for a bit and saw the engineers right in front of us doing some work."
"We decided to come back in a bit. We returned 10 minutes later and saw people getting on the ride so we returned and sat near the front.
"Less than a minute into the ride I heard horrific screams and noticed the back end of the coaster slipping and sliding off the track and a girl crying in severe distress and what appeared to be the bar raised."
He added: "I shouted for the ride to stop and staff were clearly panicking to get it stopped. It went on for a bit before it grinded to a halt.
"We had to evacuate the ride on a bend and staff were present to help people off. I saw a mobile phone and a flip flop on the grass and realised someone must have come off the ride.
"A group of girls were in shock and I asked them if they were ok which clearly they weren't.
"When I went to retrieve my bag I saw a gentleman lying face down with a member of staff and a paramedic. He wasn't moving but staff later told me he was conscious and talking."
He added that an air ambulance arrived within 20 minutes and police officers were at the scene.
Within an hour, all visitors were reportedly told to leave the park and their details were taken by staff for a refund.
The site has remained shut since.