Incident Summary:

07/07/2005: A suicide bomber detonated inside the number 204 train as it traveled between Liverpool and Aldgate Stations in London’s underground subway. Seven people, not including the suicide bomber, were killed and hundreds were injured in the attack. Abu Hafs al-Masri Brigades and the Secret Organization of al-Qaida in Europe both claimed responsibility, although it is generally believed that the claim by Abu Hafs al-Masri Brigades were not credible. Documents found by German authorities in 2011 indicate al-Qaida's role in planning and coordinating the attacks.



United Kingdom

Western Europe

region/u.s. state:



Location Details:
The incident occurred at a Liverpool Street Station.

Attack Information
Type of Attack (more) Bombing/Explosion
Successful Attack? (more) Yes
Target Information (more)
Target Type: Transportation
Name of Entity London Underground
Specific Description Number 204 Train
Nationality of Target Great Britain
Additional Information
Hostages No
Ransom No
Property Damage Yes
Extent of Property Damage Major (likely > $1 million but < $1 billion)
Value of Property Damage Unknown
Weapon Information
Type Sub-type
Explosives Suicide (carried bodily by human being)
Weapon Details
The explosive materials were homemade peroxide-based devices packed in rucksacks. It is estimated that less than 10 pounds of this explosive was used in each attack. While the manufacturing of this explosive is a dangerous process, it does not require great skill.
Additional Information
Suicide Attack?Yes
Part of Multiple Incident?Yes
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Additional Information The perpetrator, Shehzad Tanweer, traveled to Pakistan to attend a course in Islamic studies in 2004, where he met members of the bombing team. The materials used for this attack were relatively inexpensive, leading many to doubt that foreign funding was used. The claim of responsibility by the Secret Organization of al Qaeda in Europe was posted on the "Qala" website hours after the attack. MI5 has reportedly declared the attack to be largely motivated by the conflict in Iraq and other perceived injustices against Muslims by the West. Location-specific casualty information source: BBC (
Perpetrator Group Information
Group Name Claimed Responsibility
Al-Qaida 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 8 Fatalities / 171 Injured
Total Number of Fatalities 8
Number of U.S. Fatalities 0
Number of Perpetrator Fatalities 1
Total Number of Injured 171
Number of U.S. Injured 0
Number of Perpetrators Injured 0
Bruce Wilson and Jane Wardell, “Bomb Attacks on London Underground and Buses,” The Advertiser, July 8, 2005.
Peter Wilson, “Terrorists hit London – Hundreds injured in rush-hour attacks,” The Australian, July 8, 2005.
Alan Cowell, Raymond Bonner, "Changes in investigation of bombing attacks in London leave major questions unanswered," The New York Times, August 15, 2008.