A tractor driver has been arrested after an 11-year-old boy was killed at a farm near Leeds.
The boy was identified by police as Harry Whitlam, of Wakefield. He is believed to have been knocked down at around 9.20am on Friday morning at the Swithens Farm, Rothwell, West Yorkshire.
Severely injured, he was rushed to Leeds General Infirmary by air ambulance for emergency surgery but died on Friday evening.
A 48-year-old man was arrested on suspicion of drink-driving and causing death by dangerous driving.
Detective Superintendent Scott Wood of West Yorkshire Police, said: "Officers are still continuing to investigate this tragic incident with the Health and Safety Executives and we are appealing for witnesses to come forward with information."
The driver has been bailed pending further enquiries.
Local reports suggested Harry suffered head injuries from the tractor's trailer as the vehicle was reversing.
Harry was working as a farm hand at the premises, according to the Yorkshire Post.
A statement on the farm's website said the accident happened on a "working part of the farm".
A spokesman for the farm said: "There was a tragic accident on Friday and our thoughts are with Harry's family.
"We're still not sure of the full circumstances but the accident happened on the working part of the farm.
"The farm shop, cafe and petting farm are open to the general public and we are trying to run the business as normal."
* Anyone who saw the incident should contact West Yorkshire Police Major Collision Enquiry Team on 01924 293047 or via 101.