Four teenagers have been seriously injured after two carriages on The Smiler rollercoaster at Alton Towers collided.
According to the West Midlands Ambulance Service (WMAS), there were 16 people riding in one carriage on the attraction when the crash happened just after 2pm.
It is believed the passengers crashed into a stationary carriage which was empty at the time. It is yet to be confirmed whether or not all of the riders have been successfully evacuated from the rollercoaster.
WMAS spokesman Steve Parry said the four seriously injured teenagers included two male and two female casualties.
It opened in May 2013 - and the ride was affected by two incidents within the space of just six months.
Two months after it opened, in July, a metal bolt fell off the ride - leaving a gap in the track. Some 48 people had to be rescued.
Then, in November 2013, passengers sitting in the front seats of the ride were hit when several of the rollercoaster's wheels fell off.
the ride has the most inversions in the world, they aren't gonna shut it down since it's a huge selling point
mess at the amount of accidents in a short space of time though
how scary
