The name al-Qaqaa helped. It led to this, which references the story:
http://www.globalsecurity.org/org/news/2004/041030-iraq-explosives.htm
http://www.salon.com/2004/10/30/al_qaqaa/
And a search yielded this:
http://www.nytimes.com/2004/10/25/international/middleeast/25bomb.html