Incident Summary:

"08/25/2017: An assailant wielding a sword attacked police personnel outside Buckingham Palace in London, United Kingdom. At least three police officers were injured before the assailant was arrested at the scene. No group claimed responsibility for the incident; however, sources identified the assailant as Mohiussunnath Chowdhury. Sources also stated that the assailant shouted "Allahu akbar" during the attack."



United Kingdom

Western Europe

region/u.s. state:



Attack Information
Type of Attack (more) Armed Assault
Successful Attack? (more) Yes
Target Information (more)
Target Type: Police
Name of Entity City of London Police
Specific Description Officers
Nationality of Target Great Britain
Additional Information
Hostages No
Property Damage No
Weapon Information
Type Sub-type
Melee Knife or Other Sharp Object
Weapon Details
A sword was 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 Casualty numbers conflict across sources. Following GTD protocol, the most recent reliable estimates are reported here.
Perpetrator Group Information
Group Name Claimed Responsibility
Unknown No
Perpetrator Statistics
Number of Perpetrators 1
Number of Captured Perpetrators 1
Casualty Information
Total Number of Casualties 0 Fatalities / 3 Injured
Total Number of Fatalities 0
Number of U.S. Fatalities 0
Number of Perpetrator Fatalities 0
Total Number of Injured 3
Number of U.S. Injured 0
Number of Perpetrators Injured 0
"Buckingham Palace terror suspect attacked police with sword," Deutsche Welle, August 26, 2017."
"Another suspected terrorist attack in London: This time a man wielding a 4-foot sword outside Buckingham Palace," Washington Post, August 26, 2017."
"London - Buckingham Palace 'sword man' charged with planning terror act," AFP (North European Service), August 31, 2017."