Incident Summary:

03/15/2011: On Tuesday, in Jakarta, Indonesia, in one of four linked parcel bombing attacks, a letter bomb hidden in a hollowed-out book entitled "Is Pancasila Dead?" was hand-delivered by courier to the house of youth organization Pemuda Pancasila chairman, Yapto Suryosumarno. Police defused the bomb, which was discovered to contain ammonium chlorate, preventing any casualties or property damage from taking place. According to police, based on the materials used in the packages, the assailants aimed to instill fear and cause injuries, not cause deaths. No group claimed responsibility for the attack, but authorities suspected Jamaah Islamiyah (JI) militants were responsible. After examining the design of one of the devices, police detectives named a bomb-maker known as Upik Lawang as their prime suspect.




Southeast Asia

region/u.s. state:



Location Details:
The attempted bombing attack took place at the residence of youth organization Pemuda Pancasila chairman Yapto Suryosumarno in Jakarta, Indonesia.

Attack Information
Type of Attack (more) Bombing/Explosion
Successful Attack? (more) No
Target Information (more)
Target Type: Private Citizens & Property
Name of Entity Pemuda Pancasila Youth
Specific Description Yapto Suryosumarno, the Pemuda Pancasila Youth organization chairman,
Nationality of Target Indonesia
Additional Information
Hostages No
Ransom No
Property Damage No
Weapon Information
Type Sub-type
Explosives Letter Bomb
Weapon Details
A letter bomb hidden in a hollowed out book was used in the attack.
Additional Information
Suicide Attack?No
Part of Multiple Incident?Yes
Criterion 1 (more) Yes
Criterion 2 (more) Yes
Criterion 3 (more) Yes
Doubt Terrorism Proper (more) No
Perpetrator Group Information
Group Name Claimed Responsibility
Jemaah Islamiya (JI) (suspected) No
Perpetrator Statistics
Number of Perpetrators Unknown
Number of Captured Perpetrators 0
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
Straits Times, “Fourth Book Bomb Discovered in Indonesia,” Agence France Presse, March 17, 2011,
Economist, “Indonesia Politics: Extremist Threat,” Economist, March 24, 2011,®ion_id=420000442&country_id=1810000181&refm=vwCtry&page_title=Latest+analysis&rf=0.
Jakarta Post, “No Suspects Yet in Triple Bomb Attack,” Jakarta Post, March 17, 2011,