The accident happened at 1608 BST on Saturday afternoon

The accident happened at 1608 BST on Saturday on the Newquay to Par branch line at Chapel, close to the Trencreek Crossing, near Newquay.

There were 59 passengers on the train, which was the 1106 BST train from Paddington to Newquay.

None of them was injured in the accident.

The train driver suffered shock, and a member of the buffet car staff was treated for a minor neck injury, a First Great Western spokesman said.

But the driver of the tractor has been taken to hospital suffering from serious head injuries.

The police and the fire brigade are at the scene and are dealing with a leak of diesel.

Investigators from the British Transport Police are also at the crossing.

Arrangements have been made to transport the train passengers on to their destinations.

The crossing where the accident happened is the Chapel Farm crossing, where a telephone is provided so vehicles can seek permission from a signaller to cross.

The accident is the fifth collision on that stretch of track in recent months.