The passenger train derailed outside city of Santiago de Compostela
All eight carriages of the Madrid to Ferrol train derailed
The train was carrying 218 passengers when it smashed into the wall
Many were travelling to the area on the eve of a Christian festival
Foreign Office confirmed a British citizen is among the injured
Spanish PM has visited scene and declared three days official mourning
By STEVE NOLAN and JILL REILLY
A terrifying video has been captured the moment a Spanish passenger train hurtled off the tracks and smashed into a wall, killing at least 78 people.
All eight carriages of the Madrid to Ferrol train derailed near the city of Santiago de Compostela last night, leaving at least 140 people injured including one Briton.
Dramatic video footage from a security camera shows the train careering into a concrete wall as it came off the rails on the bend, before flipping onto its side and hurtling down the railway line with its terrified passengers on board.
train hurtled off the tracks and smashed into a wall, leaving at least 78 people dead and more than 140 were injured
One of the drivers was trapped in his cabin and told the railway station by radio that the train entered the bend at 190 kilometres per hour (120 mph), reported newspaper El Pais.
The speed limit on that section of track is 80km/h (50mph).
'We're only human! We're only human!' he told the station, the newspaper said, citing sources close to the investigation. 'I hope there are no dead, because this will fall on my conscience.'
Police have put an unnamed train driver under formal investigation - the Galicia government said one driver was in hospital.
train which had 218 passengers and an unspecified number of staff on board at the time of the accident hurtles down the track after falling on to its side
Newspaper reports cited witnesses as saying driver Francisco Jose Garzon,who helped rescue victims, had shouted: 'I've derailed! What do I do?' into a phone.
The accident is the worst train accident in 30 years and television footage showed one wagon pointing upwards into the air with one of its ends twisted and disfigured.
Another carriage that had been severed in two could be seen lying on a road near the track.
State-owned train operator Renfe said in a statement that 218 passengers and an unspecified number of staff were on board at the time of the accident.
train jumped the tracks on a bend just before arriving in the northwestern shrine city of Santiago de Compostela
Renfe said the derailment happened at 8.41pm local time on a high-speed section that was inaugurated two years ago.
After the crash, bodies were seen covered in blankets next to the tracks and rescue workers tried to get trapped people out of the train's carriages, with smoke billowing from some of the wreckage.
Some passengers were pulled out of broken windows, and one man stood on a carriage lying on its side, using a pickaxe to try to smash through a window.
train crash in north west Spain