Four people are believed to have been seriously hurt as two carriages crashed on a ride at Alton Towers.
BBC News reports that 16 people were on one carriage and the other involved was empty. The ride and area is being evacuated.
Merlin Entertainment, which runs the theme park, said: “There has been an incident on the Smiler this afternoon involving two carriages coming together on a low section of the track. One of the carriages was empty and the other had 16 guests on.
“The resort’s fully qualified First Responders were on the scene immediately to assist with the evacuation which is ongoing, and the area has been closed to allow for access to emergency services vehicles.
“To ensure the safe and timely evacuation of guests a platform is being constructed. This will take a few minutes but will enable us to proceed more quickly.
“There will be a full investigation once we have recovered the guests who are our priority.”