The death toll from a high-speed train collision in southern Spain rose to 40 on Monday as the government vowed a full investigation into its causes.

The crash late on Sunday is Spain's deadliest train accident since 2013, when 80 people died after a train veered off a curved section of track outside the northwestern city of Santiago de Compostela.

Originally published on doc.afp.com, part of the BLOX Digital Content Exchange.