It’s still a mystery what caused a home to explode in western Iowa’s Loess Hills on Wednesday, apparently killing the man who lived there. The victim’s body was pulled from the rubble last night. He’s tentatively identified as 63-year-old Dwane Oliver, who’d lived about six miles north of the town of Missouri Valley. Oliver built the house himself about ten years ago. Harrison County authorities say the house was destroyed by the explosion and fire. Oliver collected guns and the ammunition inside kept exploding during the blaze, hindering efforts to extinguish it. Rough terrain also hurt efforts by firefighters.