PRINEVILLE, OR -- A Prineville man's medical emergency caused a crash on Juniper Canyon Road on Sunday afternoon.

Crook County Sheriff's deputies responded just before 2:00 p.m., near Milepost 1. Investigators say 54-year-old Myrel Henning Jr. was the only occupant of the minivan when he lost control of his 2001 Chrysler Minivan and rolled down into a ditch.

He was taken by ambulance to St. Charles Prineville by ambulance. He was then flown to Bend by AirLink for further medical treatment. 

The cause of Henning's medical conditions, and his current condition, is unknown.