France, Oct. 29 -- "The whole of Spain is in mourning," said Prime Minister Pedro Sanchez, after visiting the scene of the crash in the central region of Castilla-La Mancha.

"We express our full solidarity and empathy with the families of those who have died, as well as with the injured who remain in hospital. We hope they make a speedy recovery."

The collision happened on Wednesday morning when a service run by state rail operator Renfe collided with a stationary train belonging to private Spanish company Iryo.

The Spanish flag will fly at half-mast outside all public buildings, including Spanish embassies abroad, as well as on navy vessels, Sanchez announced.

European Union flags have also been lowered to half-mast outside the Europ...