The LaSalle County Sheriff’s office is investigating the death of a 15-year-old Somonauk teen killed early Monday morning in an automobile accident.

Police said Dane Gustafson, last of Somonauk, appeared to have lost control of his vehicle while driving west on Easy Street in the Lake Holiday residential community.

Gustafson’s vehicle struck a tree. He was pronounced dead at 5:15 a.m. at Valley West Community Hospital, 11 E. Pleasant St., in Sandwich.

Gustafson was driving his parents’ vehicle, said LaSalle County Sheriff Tom Templeton.

Police could not confirm where Gustafson was headed or if he was driving impaired when the accident occurred.

The DeKalb County Coroner’s office is assisting in the investigation. An inquest is pending.