4 more BIFF experts in IED fabrication yieldThe four members of the Bangsamoro Islamic Freedom Fighters turned in rifles and explosives before they pledged allegiance to the government. COTABATO CITY, Philippines — Four more members of the Bangsamoro Islamic Freedom Fighters trained in fabrication of improvised explosive devices surrendered to the Army Friday. Local officials, among them members of the municipal peace and order council in Sultan sa Barongis, said Saturday the four erstwhile BIFF members, whose names were withheld for their safety, belonged to a group tagged in recent bombings of buses in central Mindanao. Rillera said Col. Andre Santos of the 1st Mechanized Brigade, his subordinate-officers in the 1st Mechanized Battalion and the local government unit of Sultan sa Barongis in Maguindanao del Sur cooperated in securing their surrender via backchannel dialogues. More than 300 members of the BIFF and its allies Dawlah Islamiya and Al-Khobar had surrendered to units of 6th ID since 2021.