Audio file appears to point finger at control centre, but there are questions around signalling and technical issues
World News
Spain has begun three days of mourning to commemorate the 69 people who died in a high-speed rail collision. The trains - one from Spain's state-owned Renfe and the other from the private rail company Iryo - were heading from Madrid to to the southern region of Andalucía on the same line when they collided. The Guardian's Laure Boulinier explains how it unfolded
Emergency services combed through the wreckage overnight as Civil Guard sets up clinics for relatives to provide DNA samples and help identify victims