Police are investigating the death of a teenage boy who collapsed at an assault course in Surrey.
The 14-year-old died at the adventure site in Dorking, which is run by Camelot Events, on Thursday.
Officers were called at 1pm and Surrey Police said the death is being treated as "unexplained".
The force said: "His death is being treated as unexplained; however, at this stage his death is not thought to involve any third party and a file will be passed to the coroner's office in due course."
Camelot Events, which also offers charity mud runs, survival skills, paintball, archery and raft building at the site, said it was "fully co-operating with the investigation".
Operations manager Lisa Edwards said the incident "was not connected to the safety of the obstacle course", which is said to be the most popular activity the company offers.
The Camelot Events website states that the two-hour sessions are tailored to the ability and fitness levels of each group, and warns that participants will face obstacles that will get them wet and muddy.
Children must be at least eight years old to take part and should be accompanied by a parent or guardian, it adds.
Ms Edwards said: "We would also like to clarify that, despite earlier reports, the child was not on an obstacle but was on dry land when they became unwell and collapsed.
"Out of respect to the family and friends of the child, we will not be revealing any further details about this incident.
"We have offered our deepest sympathies to the child's family and the school, and our thoughts continue to be with those affected at this incredibly sad time.
"We will also be supporting our staff who worked tirelessly in their efforts to save the child."