An area of land in Barnsley where human bones were found could be cordoned off by the police for weeks.
A skull and bones were found on land off Mitchell Street in the Swaithe area of Barnsley on Sunday afternoon.
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A forensic archaeologist confirmed the remains were human following the discovery and further examination has established that the skull was a man's.
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It is believed that the body could have been buried for 20 years.
Detectives are now trying to establish how the man died.
They said the burial site could be cordoned off for weeks while the area is examined.