An investigation into what caused an explosion that killed two people in Henry County continues. Fire and rescue crews responded to the explosion and house fire at 3207 James Avenue near Salem Wednesday afternoon. The state Medical Examiners Office has positively identified the bodies as that of 74-year-old John Allen Loyd and 72-year-old Barbara Ann Loyd. The Henry County Sheriff’s Office and the Iowa State Fire Marshall’s Office are conducting the investigation.