Conley Thompson was last seen in Locke Park, Barnsley, at about 20:00 BST on Sunday
Police searching for a missing seven-year-old boy in South Yorkshire have found the body of a child on a construction site.
South Yorkshire Police said formal identification of the body was yet to take place, but it was believed to be Conley Thompson.
The body was found at about 08:30 BST on Bank End Road in the Worsbrough area of Barnsley.
His family have been informed and are being supported by specialist officers.
Conley, of Underwood Avenue in Worsbrough near Barnsley, was last seen in Locke Park - a 40-minute walk from home - at about 20:00 BST on Sunday.
He had gone to play with friends at the park and was due to return home, but police were alerted when he did not turn up about two hours later.
Det Insp Victoria Short, leading the investigation, said: "We deployed our full resources with officers searching throughout the night to find Conley and we are deeply saddened by this tragic development.
"While it is early in the investigation, the death is being treated as unexplained and a post-mortem will take place in due course.
"Our thoughts remain with Conley's family and friends at this very difficult time."
The body of a child was found at about 08:30 BST on a construction site at Bank End Road
Police said the death was being treated as unexplained