A teenage boy has been found dead in a ditch, South Yorkshire Police have said.
A major police operation was launched after the body was discovered close to the Boulevard in Edenthorpe, Doncaster.
Ambulance crews tried to revive the teenager but he was pronounced dead, officers said.
A South Yorkshire Police spokesman said: "Formal identification procedures will take place but officers investigating are linking this to the 13-year-old boy recently reported missing in Doncaster.
"An investigation has commenced into the circumstances surrounding this tragic event. At this stage it is too early to determine the cause of death or confirm the identity of the male."
Officers have been searching for 13-year-old Lewis Eddleston, of Doncaster, since he went missing on Sunday.
The Hungerhill School pupil was last seen leaving a group of friends on playing fields in Edenthorpe at around 4pm.
Appealing for information after his disappearance, Lewis's family told a local newspaper they feared he had been abducted.