Incident Summary:

08/27/1981: Two bombs exploded at an electric substation outside of the Isla Verde International Airport in Laguna Gardens, Puerto Rico, a suburb of San Juan and Carolina. The explosions caused $30,000 in damages and left hundreds of residents in Laguna Gardens without power for two hours. There were no casualties. Two additional bombs were also found, but did not detonate due to damage of critical components of the devices caused by the first two explosions, and the bombs were subsequently deactivated by authorities. In a call to a San Juan radio station, Grupo Estrella claimed responsibility for the blasts, which coincided with a nine-day strike by 6,700 power authority workers against the Puerto Rican Electric and Power Authority, in demand of higher wages.



United States

North America

region/u.s. state:

Puerto Rico

Laguna Gardens

Location Details:
The incident occurred at a substation in Laguna Gardens (a suburb between San Juan and Carolina), outside Isla Verde International Airport

Attack Information
Type of Attack (more) Bombing/Explosion
Successful Attack? (more) Yes
Target Information (more)
Target Type: Utilities
Name of Entity Puerto Rican Electric and Power Authority (PREPA)
Specific Description PREPA electric substation in Laguna Gardens, Puerto Rico
Nationality of Target Puerto Rico
Additional Information
Hostages No
Ransom No
Property Damage Yes
Extent of Property Damage Minor (likely < $1 million)
Value of Property Damage $30,000.00
Weapon Information
Type Sub-type
Explosives/Bombs/Dynamite Unknown Explosive Type
Weapon Details
two bombs detonated and two failed to detonate
Additional Information
Suicide Attack?No
Part of Multiple Incident?No
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Perpetrator Group Information
Group Name Claimed Responsibility
Grupo Estrella 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
"FBI Analysis of Claimed Terrorist Incidents in the U.S.: 1981," Terrorist Research and Analytical Center, Terrorism Section, FBI, 1981.
"Bomb knocks out power in San Juan suburb," United Press International, August 28, 1981.
"Bombs damage substation," The Bulletin, Deschutes County, Oregon, August 28, 1981.