Incident Summary:

12/1/1976: In a series of four related attacks, unknown perpetrators sent out an incendiary device, placed in a nine-by-twelve inch manila envelope, addressed to the Federal Bureau of Investigation in New York City in the United States. The firebomb was discovered at the General Post Office in Manhattan New York. There were no casualties and it is unknown if the device caused any damage.



United States

North America

region/u.s. state:

New York

New York City

Location Details:
Manhattan; post office

Attack Information
Type of Attack (more) Facility/Infrastructure Attack
Successful Attack? (more) Yes
Target Information (more)
Target Type: Government (General)
Name of Entity Federal Bureau of Investigation
Specific Description Federal Bureau of Investigation, New York City
Nationality of Target United States
Additional Information
Hostages No
Ransom No
Property Damage Unknown
Extent of Property Damage Unknown
Value of Property Damage Unknown
Weapon Information
Type Sub-type
Incendiary Arson/Fire
Weapon Details
incendiary device powered by a small battery in an envelope
Additional Information
Suicide Attack?No
Part of Multiple Incident?Yes
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Additional Information This is part of a multiple attack with 197612010004, 197612010005, and 197612010006. The incendiary device ignited at 5:45 PM. The Independent Armed Revolutionary Commandos (CRIA) claimed the incident in a call to a New York radio station. The caller stated that the group sent out a total of fourteen incendiary devices to various government agencies. The Palestine Liberation Organization also called a news organization claiming credit for this incident. Ten days later, a letter bomb addressed to a federal government agency detonated at the General Post Office in New York City (197612100002).
Perpetrator Group Information
Group Name Claimed Responsibility
Independent Armed Revolutionary Commandos (CRIA) (suspected) Yes (Confirmed: Unknown; Mode: Call (post-incident))
Palestine Liberation Organization (PLO) (suspected) Yes (Confirmed: Unknown; Mode: Call (post-incident))
Perpetrator Statistics
Number of Perpetrators Unknown
Number of Captured Perpetrators Unknown
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
Alfred E. Clark, "Mailman Is Burned As 4 Letter Bombs Explode in Midtown," New York Times, December 2, 1976.
"4 Letter Bombs Ignite in NYC," Baltimore Sun, December 2, 1976.
"Letter Bomb Explodes in Mailbag," Sarasota Herald-Tribune, December 2, 1976.