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Abu Sayyaf - Wikipedia
National Counterterrorism Center | Groups - DNI
Philippines unrest: Who are the Abu Sayyaf group? - BBC News
Abu Sayyaf Group | Islamic Militant Group in Philippines
Philippine police kill an Abu Sayyaf militant implicated in 15 ...
Abu Sayyaf Group (Philippines, Islamist separatists)
Philippines unrest: Who are the Abu Sayyaf group? - BBC
Killing of key militant a success and worry for Philippines
Abu Sayyaf Group - CSIS
Philippine troops kill Abu Sayyaf leader, rescue hostages