A 16-year-old boy, who was badly injured while sledging remains critically ill in hospital, police have said.
Liam Stafford, 16, hit a tree in Flatts Lane Country Park, Normanby, Middlesbrough, at 1pm yesterday.
He was flown by the Great North East Air Ambulance to the James Cook University Hospital in Middlesbrough suffering from head injuries.
Cleveland Police appealed for witnesses as a spokeswoman described his condition as critical but stable.
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