Sarnia police, Sarnia Fire and Rescue, Lambton OPP, and Lambton EMS responded to a serious single-vehicle crash on Kimball Rd. just south of Plank Rd. late Tuesday morning.
Kimball Rd. was closed for a while between LaSalle Line and Plank Rd. as part of the investigation but re-opened just before 5pm.
Police say one person was transported to Bluewater Heath with life threatening injuries.
More details will be released once they're made available.