Smiler ride crashes at Alton Towers
The amusement park, at the time of writing, has said it cannot confirm whether anyone was injured - however, an air ambulance arrived at the scene.
This is not the first time there's been trouble with the Smiler ride. In 2013, it was closed after plastic guard wheels came loose and hit front row riders.
The Smiler cost £18m and is Alton Towers' 14-loop rollercoaster. In the past, it has also been closed after a piece of track became dislodged.
In a statement, Alton Towers 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 in."
"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."