BILLINGS, Mont. -

A 46-year-old Billings man has died in a motorcycle crash that may have been caused by a medical condition.
    
The Montana Highway Patrol says the man was northbound on Blue Creek Road about 12 miles south of Billings on Sunday afternoon when he drove straight through a curve in the road. The bike landed in the grass and the driver was thrown from the motorcycle. Trooper Aaron Freivalds says the man suffered a neck injury and died at the scene.
    
The Yellowstone County coroner's office will conduct an autopsy to determine the cause of death. The man's name was being withheld until family members were notified.