Peel paramedics say a 27-year-old man has been rushed to hospital via air ambulance following an industrial accident in Bolton.
It happened in the area of Nixon Road, near Highway 50 and Mayfield Road, shortly before 8 a.m.
Paramedics say the worker, who is employed at a metal fabricating company, was injured after he got caught in some type of machinery.
He has been taken to a trauma centre via Ornge air ambulance.
Caledon OPP say the man suffered a head injury and sustained serious to life-threatening injuries.
