The child went missing on Monday evening in Broechem town while out cycling at the camp, according to the report.
Police started a murder investigation and five suspects were arrested.
"I wish to express my sincere condolences on the tragic death of a child. An investigation will be conducted in a transparent and independent manner. The guilty must be punished," Belgian Prime Minister Charles Michel said on Twitter.» Other NewsNorwegian police thank mosque attack 'heroes'Turkey beat Greece 75-62 at U16 European ChampionshipGerman police chief warns of far-right terror threatFootball: Turkish defender Mert Cetin joins RomaTweets by milletworld