Madrid, Spain - Four US citizens and one each from Canada, Japan, Argentina, Mexico, Tunisia, and the Czech Republic are among the 69 killed in last week's high-speed train collision in Spain, authorities said.

Wednesday's disaster – one of Europe's deadliest rail accidents this century – has seen victims' relatives endure an agonizing wait as forensics teams identify the dead, sometimes from individual body parts.

A legal body set up to handle the identification work, made up of police and forensics experts, announced in a statement late on Sunday the 10 latest confirmed foreign victims.

It had already announced the deaths of a French and a Portuguese citizen, as well as that of 54 Spaniards.

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All but three of the victims are now identified, the statement added.

The accident was Spain's second high-speed train collision this year and raised fresh questions about the country's rail safety, after a crash in the southern region of Andalusia in January killed 46 people.

The latest disaster struck when a service by state operator Renfe ploughed into the back of a stationary train belonging to Spanish company Iryo outside the central village of Urda, around 80 miles south of Madrid.

The failure of an automatic safety system halted all trains on a roughly 39 stretch of track, but a control centre authorised the Renfe service to resume its journey while the other train was still.

The tragedy came one month before a November 29 general election in which Socialist leader Pedro Sanchez will seek to overcome unfavourable polls and extend his eight-year premiership.