A woman has been taken to hospital with serious injuries after falling from a ride at Hull Fair.
A statement from Humberside Police said it is believed she fell from one ride onto the base of another nearby.
A teenager who was on the ground received minor injuries when he was struck by the falling woman on Monday evening.
Both rides have been closed while officers and health and safety officials from Hull City Council work together to establish what happened, police said.
Chief Inspector Paul Kirby, tactical commander for Hull Fair, said: “A woman has sadly been seriously injured this evening at Hull Fair and taken to hospital by ambulance.
“We do not believe her injuries are life threatening or life changing.
“A teenage boy was struck by the woman as she fell. He thankfully only sustained minor injuries.
“We have very well established plans in place with the council for any incident like this at the fair, and I want to thank everyone for their patience while we deal with this.
“I am appealing for anyone who might have seen what happened, or who has any video footage of it to contact us.”