Transportation authorities have provided more information on a multiple fatality pileup crash that occurred on Thursday morning in Mississippi County, Missouri.

The pileup occurred on I-57 between mile markers 10 and 12 near Charleston, Missouri on March 17.

KFVS12 reports that it is believed that the pileup began when someone slammed on their brakes, triggering a chain reaction crash.

Crews reported thick fog when they arrived on the scene.

Transportation officials say that more than 70 vehicles were involved in the pileup. Many of the vehicles were semi trucks.

According to the Sikeston Standard Democrat, at least four people are reported dead. Several more people have been reported injured.

Both directions of I-57 are closed. There is no estimated time for the interstate to reopen.