A male passenger in an SUV suffered serious injuries after the vehicle and a dump truck collided in Springwater Township.
Huronia West OPP say this happened around 8:45 a.m. Tuesday on Wilson Avenue near Highway 26.
The passenger was transported to a Toronto-area hospital.
The road was closed for several hours so police could investigate.
The investigation is ongoing. Anyone with information or who may have been travelling in the area at the time with dash camera footage is asked to call Huronia West OPP at 705-429-3575 or 1-888-310-1122.