Incident Summary:

03/22/2017: An assailant drove a vehicle into pedestrians along the Westminster Bridge in London, United Kingdom. The assailant then fled the vehicle outside the Palace of Westminster, stabbing a police officer before being shot and killed by police forces. In addition to the assailant, five people were killed and at least 50 people were injured in the attack. Khalid Masood, a Muslim extremist, claimed responsibility for the incident and stated that the attack was carried out in retaliation for Western military offensives in the Middle East. The Islamic State of Iraq and the Levant (ISIL) also claimed responsibility for the incident; however, authorities doubted the veracity of this claim and could not confirm Masood's connection to ISIL.



United Kingdom

Western Europe

region/u.s. state:



Location Details:
The incident occurred at the Westminster Bridge.

Attack Information
Type of Attack (more) Armed Assault
Successful Attack? (more) Yes
Target Information (more)
Target Type: Police
Name of Entity Metropolitan Police Parliamentary and Diplomatic Protection (PaDP)
Specific Description Officer: Keith Palmer
Nationality of Target Great Britain
Target Type: Private Citizens & Property
Name of Entity Not Applicable
Specific Description Civilians
Nationality of Target Multinational
Additional Information
Hostages No
Property Damage Unknown
Extent of Property Damage Unknown
Value of Property Damage Unknown
Weapon Information
Type Sub-type
Melee Knife or Other Sharp Object
Vehicle (not to include vehicle-borne explosives, i.e., car or truck bombs)
Weapon Details
A knife and a vehicle were 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
Additional Information The victims included Romanian civilians Andreea Cristea and Andrei Burnaz, United States civilians Kurt Cochran and Melissa Cochran, British civilians Leslie Rhodes and Aysha Frade, and French civilians. Casualty numbers conflict across sources. Following GTD protocol, the most recent reliable estimates are reported here.
Perpetrator Group Information
Group Name Claimed Responsibility
Muslim extremists Yes (Confirmed: Unknown; Mode: Posted to website, blog, etc.)
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 0
Casualty Information
Total Number of Casualties 6 Fatalities / 50 Injured
Total Number of Fatalities 6
Number of U.S. Fatalities 1
Number of Perpetrator Fatalities 1
Total Number of Injured 50
Number of U.S. Injured 1
Number of Perpetrators Injured 0
"Romanian Woman Injured In London Attack Dies," Radio Free Europe, April 7, 2017."
"Five dead and 40 injured in London attack," BBC, March 23, 2017."
"Westminster terror attacker Khalid Masood's final message revealed," The Telegraph, April 28, 2017."