Internet service provider Easynews.com of Phoenix, Arizona, said it had been contacted by investigators by telephone Thursday and the company was issued a subpoena Friday.
"It looks like the original variant was posted through us to Usenet on the 18th (of August)," Michael Minor, the Internet service provider's chief technology officer, told Reuters.
An FBI spokesman said that the organization was working with the Department of Homeland Security to investigate who was responsible for the e-mail attacks. He declined to comment further.
Best New Blog finalist - 2003 Koufax Awards
A non-violent, counter-dominant, left-liberal, possibly charismatic, quasi anarcho-libertarian Quaker's take on politics, volleyball, and other esoterica.
Lo alecha ha-m'lacha ligmor, v'lo atah ben chorin l'hibateyl mimenah.