AURORA, Minn. -

A death investigation is underway in Aurora after a man's body was found on a highway.

Authorities identify the man as 24-year-old Scott Christensen of Aurora.

The discovery happened around 4 a.m. Sunday on the 3600 block of Highway 100.

The exact cause of death was not known Sunday, but investigators believe Christensen was struck by a vehicle. They just don’t know if he was already dead before the vehicle hit him.