Some more info from Spanish media. The track that broke was from 1989 and had not been maintained properly.
No, the claim is that the broken rail was the new one but it happened at the transition from old to new.
Got a link?
And how does it accord with the many statements made early on about the track being renewed recently?
No, the claim is that the broken rail was the new one but it happened at the transition from old to new.