Incident Summary:

10/24/2018: A letter bomb addressed to Democratic Representative Maxine Waters was discovered and defused at a mail sorting facility in Capitol Heights, Maryland, United States. This was one of 16 coordinated mail bomb attacks and one of two letter bombs addressed to Waters between October 22, 2018 and November 1, 2018 that targeted critics of President Donald Trump. Cesar Altieri Sayoc was arrested in connection with the incidents. Sources noted that Sayoc's vehicle was covered in right-wing paraphernalia.



United States

North America

region/u.s. state:


Capitol Heights

Attack Information
Type of Attack (more) Bombing/Explosion
Successful Attack? (more) No
Target Information (more)
Target Type: Government (General)
Name of Entity House of Representatives
Specific Description Democratic Representative: Maxine Waters
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Explosives/Bombs/Dynamite Letter Bomb
Weapon Details
A six-inch PVC pipe filled with pyrotechnic powder, fertilizer, pool chemicals, and broken glass as shrapnel was used in the attack. The device was connected to a small battery and an inoperative digital clock and mailed in a manila envelope.
Additional Information
Suicide Attack?No
Part of Multiple Incident?Yes
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Perpetrator Group Information
Group Name Claimed Responsibility
Pro-Trump extremists No
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 1
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
"Bomb timeline: What we know about the 10 devices sent to prominent Democrats, Trump critics," Washington Post, October 25, 2018.
"L.A. Mail Facility Evacuated Over Suspect Item Sent to Rep. Waters," City News Service, October 24, 2018.
"Pipe bomb found at Congressional mail sorting facility in Capitol Heights, Maryland," WUSA 9, October 24, 2018.