A seven-year-old boy was taken to hospital after falling from a Lightwater Valley rollercoaster, according to eyewitnesses.
The incident is understood to have taken place on the Twister spinning rollercoaster at 11:30 this morning.
Police said that the boy was conscious upon their arrival, and his condition was not believed to be life-threatening.
Eyewitness Lara-Susan James told the BBC that the boy’s party was “shouting at the operator” to stop the ride.
“I saw the operator apply the emergency stop and my husband pointed to the fallen kid on the ground saying they had fallen out.”
Fellow park guest Mark Charnley said the boy was “hanging backwards outside the actual carriage”.
The Health and Safety Executive has attended the North Yorkshire theme park, and the ride has been closed to allow investigations to take place.
20-year-old student Gemma Savage was killed when two of the ride’s carriages collided.