Incident Summary:

04/19/2013: Police thwarted a potential bomb attack when they engaged in a firefight with the alleged assailants of the Boston Marathon bombings, Tamerlan and Dzhokhar Tsarnaev, in Watertown, Massachusetts, United States. Shortly after hijacking a civilian vehicle, the suspects were confronted by police, leading to a firefight that resulted in the death of Tamerlan Tsarnaev. Dzhokhar Tsarnaev and 16 police officers were injured in the exchange. One of the injured officers, Dennis Simmonds, succumbed to his injuries on April 10, 2014. During the encounter, the suspects hurled explosives at the officers. It was later revealed that the Tsarnaev brothers were plotting to use the explosives to carry out an attack in an unconfirmed location. Dzhokhar Tsarnaev was arrested later that evening after he was discovered hiding in a boat that was parked in a Watertown, Massachusetts, resident's backyard. Tsarnaev had written a claim of responsibility on the side of the boat. On July 10, 2013, Dzhokhar Tsarnaev pleaded not guilty to 30 federal counts related to the Boston attacks, including one for the use of a weapon of mass destruction.



United States

North America

region/u.s. state:



Attack Information
Type of Attack (more) Bombing/Explosion
Type of Attack (more) Hijacking
Successful Attack? (more) Yes
Target Information (more)
Target Type: Unknown
Name of Entity Unknown
Specific Description Unknown
Nationality of Target United States
Additional Information
Hostages Yes
Number of Hostages 1
US Hostages 1
Hours of Kidnapping 1
Outcome Hostage(s) escaped (not during rescue attempt)
Ransom No
Property Damage Yes
Extent of Property Damage Minor (likely < $1 million)
Value of Property Damage Unknown
Weapon Information
Type Sub-type
Explosives Pipe Bomb
Explosives Other Explosive Type
Weapon Details
A pressure cooker bomb and five pipe bombs were to be used in the attack.
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
Muslim extremists Yes (Confirmed: Unknown; Mode: Note left at scene)
Perpetrator Statistics
Number of Perpetrators 2
Number of Captured Perpetrators 1
Casualty Information
Total Number of Casualties 2 Fatalities / 16 Injured
Total Number of Fatalities 2
Number of U.S. Fatalities 1
Number of Perpetrator Fatalities 1
Total Number of Injured 16
Number of U.S. Injured 16
Number of Perpetrators Injured 1
"Timeline: The Boston Marathon bombing, manhunt and investigation," CNN Wire, May 2, 2013.
"'CAPTURED!!!' Boston police announce Marathon bombing suspect in custody,", April 20, 2013.
"Death benefit given to family of officer wounded in Tsarnaev shootout," The Boston Globe, May 28, 2015.