A teenager has lost both his legs after jumping onto the roof of a train with a group of friends and falling off.
The 14-year-old boy, who has still to regain consciousness after having both lower limbs amputated, hurt himself near a Cheshire train station on Friday.
He and his friends were jumping on the outside of the freight train to ride it for a short distance - a practice known as "train surfing".
Police have launched an investigation into the accident.
British Transport Police said: "At about 1930 on Friday, police and ambulance services attended Northwich Train Station in Cheshire where a 14-year-old local youth had been involved in an accident with a slow moving train carrying stone."
The boy's parents were said to be at his bedside on Monday night, at Wythenshawe Hospital in Manchester where he is being treated.
Anyone with information is urged to contact British Transport Police on 0800 405040.