Alton Towers crash witness: 'People were screaming and shouting'

Four people have been seriously injured in a crash between two carriages on a ride at Alton Towers in Staffordshire.

Sixteen people were on one carriage of the Smiler ride, the other was empty.

Ben Richardson, who was queuing for the ride at the time, told the BBC News Channel's Simon McCoy what he had seen at the time of the crash.

Merlin Entertainment, which runs the resort, said in a statement: "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.

"There will be a full investigation once we have recovered the guests who are our priority."