We have learned the names of the family of four that died in a one vehicle crash on Interstate 90.
Police say family was from Sioux Falls. The father, James Vollmer, mother, Julie Vollmer, 16-year-old Alyssa and 13-year-old Caleb died as a result of the crash.
The truck the family was driving in was headed east on I-90 just west of Sioux Falls when it left the roadway, struck a cable guardrail and slid into the median. There it hit an embankment and vaulted before coming to rest.
Law enforcement detoured westbound traffic as two medical helicopters landed on I-90 to take the victims to nearby hospitals.
At this point, it's unknown what caused the truck to leave the road. Everyone in the vehicle was wearing a seatbelt.
Sioux Falls Christian schools officials say a gathering will be held at the school on Sunday from 1 p.m. to 3 p.m. for middle and high school students and parents.