Why did Spain's transport minister quit after the Urda crash?

The Urda crash killed 69 people in Toledo province, on Spain's high-speed network. Transport minister Óscar Puente resigned, having earlier defended his post, according to Europa Press columnist Antonio Casado. Casado calls the timing late and says Pedro Sánchez had publicly praised him.

eldiario.es recalls that after the Angrois crash, which killed 81 people, the minister at the time, Ana Pastor, did not resign.

Puente gave dignity and the 69 victims as his reasons, according to eldiario.es. Columnist Rafael Torres says he left urgent technical measures in place to prevent similar incidents. PP and Vox blame Pedro Sánchez, while Podemos and Frente Amplio call for nationalising the railways.