A discovery of human bones is not believed to be linked to missing Suzy Lamplugh, police have said.
An investigation has been launched after the remains were found in Kempsey, Worcestershire on 12 July.
It is about eight miles from Pershore, where searches have been conducted following new information into the estate agent’s disappearance in 1986.
West Mercia Police said until a post-mortem examination, officers cannot link the find to any particular person.
Supt Damian Pettit said the remains had been found during the routine emptying of a septic tank in the village.
The bones are undergoing forensic testing, he said.
The force has said it was currently being treated as an unexplained death and it was in the very early stages of an investigation.
Ms Lamplugh, 25, from London, disappeared in July 1986 and was declared dead, presumed murdered, in 1994.
A body has never been found and her killer never charged.
Officers from West Mercia Police had been assisting the Metropolitan Police with the latest search.
It was sparked following publicity about a search last year of a property in Sutton Coldfield, which once belonged to the mother of prime suspect John Cannan.
There have been previous searches in Worcestershire in connection with Ms Lamplugh’s disappearance. Police excavated a field near the former Norton Army Barracks in 2000 and 2001 and land near the village of Drakes Broughton in 2010.
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