Incident Summary:

02/02/2004: The office of Senate majority leader Bill Frist in Washington D.C., U.S.A., received an envelope filled with ricin from an unknown individual. No injuries were reported in the incident.



United States

North America

region/u.s. state:

District of Columbia


Attack Information
Type of Attack (more) Facility/Infrastructure Attack
Successful Attack? (more) No
Target Information (more)
Target Type: Government (General)
Name of Entity United States Senate
Specific Description The office of U.S. Senate Majority leader Bill Frist in Washington D.C.
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Weapon Details
Ricin was sent through the mail in a package.
Additional Information
Suicide Attack?No
Part of Multiple Incident?No
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Perpetrator Group Information
Group Name Claimed Responsibility
Unknown No
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 0
Casualty Information
Total Number of Casualties 0 Fatalities / 0 Injured
Total Number of Fatalities 0
Number of U.S. Fatalities 0
Number of Perpetrator Fatalities 0
Total Number of Injured 0
Number of U.S. Injured 0
Number of Perpetrators Injured 0
Jesse J. Holland, “Poisonous Ricin Shows up in Senate Mailroom, Frist Says,” The Associated Press, February 3, 2004.
Dan Eggen and Carol Leonnig, “Investigators Seek Ties in Anthrax, Ricin Cases,” The Washington Post, January 4, 2004.
Curt Anderson, “Investigators Struggle With Ricin Probe,” The Associated Press, March 10, 2004.