A 19-YEAR-OLD boy was killed when a grenade exploded inside a house in Cavite on Monday morning. Amadeo Chief of Police Senior Insp. Bismark Mendoza said the police station got a call at about 1:30 a.m. about an explosion in Barangay Halang. Mendoza said the victim identified as Russel Almeria y Payas was instantly killed while the suspect who threw the grenade, Edgar Almeria, remains at large. The victim’s mother and brother, who were in the other room, were not hurt.