ROADSIDE BOMB. Police investigators look for clues after an improvised explosive device exploded beside an Army detachment in Barangay Makir, Datu Odin Sinsuat town in Maguindanao Saturday night, August 11, 2012.

The military had advised motorists using the Cotabato-Isulan highway to travel with caution because of threats of attacks from the Bangsamoro Islamic Freedom Fighters (BIFF).

MindaNews photo by Froilan Gallardo