FORT PIERRE, S.D.—The South Dakota State Fire Marshal’s Office is investigating a house explosion that killed a baby and her grandparents and left two young children hospitalized with burns.
The house about 11 miles southwest of Fort Pierre exploded around 10:20 a.m. Wednesday, Stanley County Sheriff Brad Rathbun said.
The sheriff said 6-month-old Harper Hupp and her grandmother, LaDonna Hupp, 61, died at the scene. William Hupp, 66, died at a hospital.
Two boys, 5-year-old Myles and 3-year-old Royce, were seriously injured and flown to a burn unit at a St. Paul, Minnesota, hospital.
The children’s parents, Kelsey and Trevor Hupp, were at work in Pierre at the time of the explosion. LaDonna and William Hupp were Trevor Hupp’s parents….