| 11. | Initial reports of a third letter bomb later turned out to be false.
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| 12. | Technicians will set off a letter bomb and a package bomb.
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| 13. | Four letter bombs were found at U . N . headquarters on Monday.
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| 14. | At least one person has been killed by a letter bomb.
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| 15. | Austria has been plagued by periodic letter bomb campaigns for almost two years.
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| 16. | Whether the letter truly contains a letter bomb must be carefully technically researched.
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| 17. | Most of the letter bombs apparently carried postmarks from Alexandria, Egypt.
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| 18. | Only the first of the letter bombs has caused any injury.
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| 19. | Just read their little letter bombs and move on to the next posting.
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| 20. | Late Monday evening, a police spokesman confirmed that they were also letter bombs.
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