CASS COUNTY, Mich. -- Sheriff Richard J. Behnke reports that a call came in at approximately 10:08 p.m. on Thursday involving a single vehicle personal injury crash on M-40 Highway, south of Pioneer Street, Marcellus Township.

Initial investigation shows that a 33-year old Three Rivers resident was driving south on M-40 Highway when the vehicle crossed the center lane, leaving the roadway and crashing into a tree.

The driver and front seat passenger were extricated from the vehicle, and were evaluated by Emergency Medical Personnel. The driver was transported by MedFlight to Bronson Methodist hospital, and the passenger was transported by Air Care to Bronson Methodist hospital.

Officials say that seat belts were worn, but it is unknown if alcohol, drugs or speed were factors in this crash.

The crash still remains under investigation.