FOND DU LAC COUNTY -- Two of six teens in the hospital after a deadly crash over the weekend, including the 18-year-old driver, have been released. Three other girls died in the same accident.

All the girls went to Campbellsport High School and they were killed or injured after a Chevy Tahoe they were in crashed.

At a press conference today, the Fond du Lac County Sheriff said speed is to blame for this deadly crash, and that some of the teens were not wearing seat belts.

Blood was taken to check for alcohol, but right now the sheriff says it does not appear to be a factor. He says prior to the crash, the girls were at a sleepover and had toilet papered a friends house.

Investigators say as responders they can never be ready for an accident like this.

CBS 58's Vanessa Murphy will have more on the new details tonight on the CBS 58 News at Five.