The child disappeared on Monday during a holiday organised by a drugs charity, which said something went “horrifically wrong”.
A four-year-old boy reported missing has died in hospital after being found in a swimming pool at an activity centre in Devon.
The child was reported missing at Knapp House Activity Centre in Bideford just before 3pm on Monday.
A search assisted by a police helicopter followed before he was located.
Police said his death is currently being treated as unexplained.
The incident happened during a week-long summer holiday camp organised by Devon Narcotics Anonymous, a group that supports its members in stopping drug and alcohol use.
In a statement the group said something had gone “horrifically wrong” that had resulted in the young child of a member drowning in the pool.
“We are devastated that a truly wonderful week has ended so tragically,” the statement said.
“We find all attempt at expressing our sorrow and concern for the parents and siblings of this child inadequate, but as is normal in our fellowship, they will have plenty of support as they face their tragedy.
“In Narcotics Anonymous, we share no specific religious beliefs, but the entire campsite formed a circle, held hands, and prayed for the family and their lost child.”
Anyone with information regarding the incident has been asked to call police on 101.