Nottawasga OPP is investigating a single-vehicle crash that occurred early Friday and sent four people to hospital.
The collision happened just before 2 a.m. on the Adjala Tecumseth Townline near Loretto.
Three of the four occupants of the vehicle were taken to a local hospital as a precaution with minor injuries, and one was airlifted to a Toronto trauma centre in serious condition, but their condition has since been upgraded.
The road was closed for several hours.
The investigation continues.
Witnesses are asked to contact Nottawasaga OPP at 1-888-310-1122.
Banner Image: Supplied (Nottawasaga OPP)