Roughly half of the killed expatriates were Japanese, Malaysians or Filipinos, most of them working on a project by Japan's JGC Corp.

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Three workers for a Japanese engineering company that was working on the site had been contacted and were safe, said Takeshi Endo, a senior manager for JGC Corp.

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Three workers for a Japanese engineering company that was working on the site have been contacted and are safe, said Takeshi Endo, a senior manager for JGC Corp.

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Will Campbell, director of JGC Engineering, who traces the family-owned firm back six generations to a blacksmith's forge, is building a computerised crane for a German company that needs it to remove nuclear-fuel rods from a defunct Lithuanian reactor.

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