The preliminary cause of death for Ellen Marie "Ellie" Ahmann is being listed as "accidental drowning," according to La Crosse County Medical Examiner Tim Candahl.

Ahmann, a Winona State University student, died after her car fell through the ice and went into the Mississippi River in La Crosse on Wednesday, January 1.

Candahl said toxicology results are not expected to be back for several weeks.