The office of the Will County Coroner’s office reports that a woman was killed in a traffic crash early Sunday on Interstate 55.

Coroner Laurie H. Summers reported that Melissa Prosser, 26, of Bourbannais was pronounced dead at 4:14 a.m. Sunday at St. Joseph’s Medical Center in Joliet after a motor vehicle crash on southbound I-55 at mile marker 246 near Channahon.

The crash is under investigation by Illinois State Police.

An autopsy was conducted Sunday morning and a final cause of death will be determined following final police and toxicology reports.