Spain's Transport Ministry has increased the provisional death toll from Wednesday's high-speed train collision to 69. The number of people injured is pending confirmation.

Police have appealed to family members of the crash victims to provide DNA sampling to help with the identification process.

Spanish Prime Minister Pedro Sánchez on Thursday said that authorities are "working day and night, not only to provide a response to the victims and their families, but to clarify every last detail of this tragedy and to strengthen security so that it never happens again."

As the country's top institutions continue investigating the cause behind the collision, Transport Minister Óscar Puente has suggested that a combination of “inexplicable” human error and a computer failure was likely behind the tragedy, which occurred near Urda, Toledo, more than 80 miles south of Madrid.

Puente said in a press conference that the state-operated Renfe train slamming into the rear of a stationary private train operated by Iryo…