جماعة أبو سياف
Some 20 Abu Sayyaf surrendered in Sumisip on September 22. The day before, Philippine armed forces confiscated 200 speedboats used by the Abu Sayyaf in Basilan, Sulu, Tawi-Tawi and Zamboanga. President Duterte rejected a proposal by Nur Misuari, the leader of MNLF to include Abu Sayyaf in peace talks. On September 27, another attempt to smuggle weapons to Abu Sayyaf was prevented by the Philippine National Police in San Juan City. Four people were arrested. By October 14, the Philippine military had launched 579 military operations, 426 of which were focused to "neutralise" group members. 54 engagements resulted in 56 Abu Sayyaf members killed, 21 surrendered and 17 arrested.