An investigation into the accident is being conducted by the St. Louis County Police Department Crimes Against Persons Unit and Accident Reconstruction Team.
Hazelwood Central High School students visited a small memorial for the fallen students that has risen at the scene of the accident.
Jayme McLemore, who had been dating one of the victims and had known the victim since sixth grade, was at the crash site Thursday afternoon.
"I've been crying a lot," said McLemore. "I'm holding up, but it's not really real to me yet."
The Hazelwood School District released a statement saying privacy laws prevent the district from commenting on what has happened, but did say it offered condolences to the families affected by the tragedy.