The mystery continues surrounding a Sept. 29 explosion at the home of Burley GOP Rep. Fred Wood, which severely burned Wood's wife.
An explosion in Wood's basement gun vault room resulted in a blast that lifted a 4-inch concrete ceiling and caused the house's patio roof to collapse. Amy Wood suffered second-degree burns from the blast, requiring her to be rushed to a Salt Lake City burn center.
But this morning's Twin Falls Times-News reports that a report by a state fire marshal said that there was no single cause for the incident and that the cause of the fire will be considered "undetermined" unless new evidence is discovered.
The Times-News reports that investigators found that the last time Wood was in the gun vault was days before, when he was cleaning his guns with rags, but no ignition source was determined.
Amy Wood returned home after a three-week stay at the University of Utah's Burn and Trauma Center.
The Woods have since moved into a second home in Boise, where they plan to stay until the end of the 2013 legislative session, according to the Times-News.