A six-year-old boy is fighting for his life after a quad bike he was a passenger on smashed into a motorbike in a head-on crash.
The youngster was thought to be riding with his dad when the off-road motorbike collided with another Wintersett Nature Reserve in Wakefield, West Yorkshire.
Police said he suffered serious head injuries, which were described as 'life-threatening' and issued an appeal for witnesses.
West Yorkshire Police said the collision happened at around 1pm on Sunday afternoon.
A spokesman said: "A quad bike travelling along a concrete footpath through the nature reserve, from the direction of Santingley Lane, was in collision with an off-road motorbike which was travelling in the opposite direction.
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"The six-year-old boy, who was a passenger on the quad bike, suffered serious head injuries in the collision.
"Officers from West Yorkshire Police are appealing for anyone who witnessed the collision or the circumstances leading up to it, or anyone who may have video footage of the incident to contact the Roads Policing Unit."
Call police with information on 101.