The Spink County Sheriff's office says 41-year-old Beth Ann Ptacek was killed earlier this week in a house fire in Conde, South Dakota.
Authorities released this information Tuesday afternoon after family was notified.
Just before 5:00 a.m. Sunday, crews were called to the Ptacek's home, which was engulfed in flames.
Beth's husband, 50-year-old Steven Lynn Ptacek was injured in the fire and flown to a Minneapolis Hospital.
Investigators say the cause of the fire remains unfounded and may never be determined. But, they say, foul play is not suspected.