Detectives are investigating an armed robbery that occurred in the 1600 block of Mast Dr. The victim was summoned to the front door of his residence by an unknown person knocking at the door. When the victim opened the door, he was met by three b/m subjects. The victim stepped outside where one of the b/m's produced a handgun and robbed him of his personal belongings. After committing the robbery, the three b/m suspects fled the area on foot towards Port Dr. Two of the b/m suspects are described as being in their late teens wearing white t-shirts and blue pants. The third suspect was described as being approximately eight to ten years old. Persons with information regarding this investigation are asked to call 389-5000.