Incident Summary:

08/21/2017: Assailants attacked a multi-purpose hall in Tubigan, Maluso, Basilan, Philippines. This was one of two related attacks in this area on this day. At least nine people were killed and 16 others were wounded across both attacks. No group claimed responsibility for the incident; however, sources attributed the attack to the Abu Sayyaf Group (ASG).




Southeast Asia

region/u.s. state:



Location Details:
The incident occurred in the Maluso district.

Attack Information
Type of Attack (more) Armed Assault
Type of Attack (more) Facility/Infrastructure Attack
Successful Attack? (more) Yes
Target Information (more)
Target Type: Private Citizens & Property
Name of Entity Not Applicable
Specific Description Multi-purpose Hall
Nationality of Target Philippines
Additional Information
Hostages No
Ransom No
Property Damage Yes
Extent of Property Damage Minor (likely < $1 million)
Value of Property Damage Unknown
Weapon Information
Type Sub-type
Firearms Unknown Gun Type
Incendiary Arson/Fire
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
Additional Information Casualty numbers conflict across sources. Following GTD protocol, the majority reliable estimates are reported here. Casualty numbers represent a division of the total number of those killed and wounded across incidents 201708210009 and 201708210010.
Perpetrator Group Information
Group Name Claimed Responsibility
Abu Sayyaf Group (ASG) No
Perpetrator Statistics
Number of Perpetrators 20
Number of Captured Perpetrators 0
Casualty Information
Total Number of Casualties 4 Fatalities / 8 Injured
Total Number of Fatalities 4
Number of U.S. Fatalities 0
Number of Perpetrator Fatalities Unknown
Total Number of Injured 8
Number of U.S. Injured 0
Number of Perpetrators Injured Unknown
"Nine dead in attack by Abu Sayyaf terrorists in southern Philippines," Deutsche Presse-Agentur, August 21, 2017.
"Philippines: After Basilan rampage, Wesmincom to deploy additional troops,", August 24, 2017.
"Abu Sayyaf beheads ex-Philippine soldier in Basilan," Anadolu Agency (AA), August 23, 2017.