An 18-year-old man from Perth South remains in hospital after a farming accident at a farm north of St. Marys.

Shortly before 11:30 a.m. on Saturday, emergency personnel responded to a farm located on Line 15 in Perth South.

Upon arrival, they found a man pinned underneath an overturned tractor.

He was treated at the scene and was later transported by air ambulance to a hospital in London.

Police say the victim was pulling large cement blocks with the tractor when the tractor suddenly rose up in the air.

The man fell off the tractor and the tractor slammed onto the man.

He remains in hospital with non-life threatening injuries.