The guard sustained gunshot wounds in the back but managed to load his shotgun and fire back, killing one of them in the process, radio dzBB's Sam Nielsen reported.
Police said the incident occurred in front of a food outlet at the Alabang Town Center past 11 a.m.
Initial investigation showed the slain security guard, who was not immediately identified, was assigned to a money changer shop.
On the other hand, the slain suspect was described as wearing shorts and a polo shirt.
Police are now tracking the other suspects, who fled aboard motorcycles.
[From GMA News]