Police are investigating the death of a 16-year-old boy who suffered a “medical episode” at Barry Island Pleasure Park.
South Wales Police said officers were trying to “ascertain the full circumstances” of the boy’s death.
The force was called to the park in the Vale of Glamorgan on Friday at about 17:00 BST.
It said: “Anyone who was in Barry Island Pleasure Park around the time of the incident that may have information that could assist our investigation is asked to contact us.”