A major police operation has been launched after a teenage boy was found dead in a ditch, South Yorkshire Police have said.
The body was found close to the Boulevard in Edenthorpe, Doncaster, on Wednesday.
Ambulance crews tried to revive the teenager but he was pronounced dead, officers said.
The teenage boy's cause of death is currently unknown
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.
A large field with a ditch running through it was cordoned off in Edenthorpe today.
The area. which is behind Hungerhill School, was guarded by a number of police officers and community support officers. A number of police vehicles were also parked in surrounding lanes.
More officers could be seen working in the field, which is mainly long grass and used for horses.
A man answering the door at Lewis's home in the Clay Lane area of Doncaster said the family did not want to discuss the tragedy.
People laying flowers close to the scene also said they did not want to talk.