Sixty-nine people died in the collision near Toledo two weeks ago and 28 are still in hospital.
Prosecutors begin investigating EU funds meant for upgrading the Spanish railway line where a train crash killed 69 people.
Pedro Sánchez and his socialist-led coalition government are racing to rebuild trust ahead of a snap election, but the task they face is immense
At least 69 people were killed and dozens injured in the collision south of the capital, Madrid.
Spain's second high-speed rail disaster this year, a crash in which one train struck another from behind, killing 68 people, has raised fresh concerns about the safety of the country's rail network.