Human remains unearthed by contractors working on a pipeline in west Wales have been identified as specimens used by the medical profession or students.
Police put up a tent at the scene of the discovery at St Clears
Police started an investigation after a thigh bone and other fragments were found near St Clears, Carmarthenshire.
A Home Office pathologist was called in and an incident room set up.
But Dyfed-Powys Police confirmed on Friday that the remains were medical specimens likely to have been dumped with rubbish at the site in the 1940s.
The human thigh bone and other bone fragments were found in the field by contractors preparing the ground for a liquefied natural gas (LNG) pipeline from Milford Haven.
Police erected a tent and conducted an examination of the scene.
Officers said they were checking missing person files and previous murder cases for clues to who the remains belonged to.
But the Dyfed-Powys force confirmed on Friday that the remains were anatomical specimens used in the medical profession.
The force said they were likely to have been used by a medical practitioner or student some time during the 1940s and may have been dumped with rubbish at the site.
Police added that the remains were not connected with any criminal activity but the force remained interested in establishing their origins.
A statement read: "We would like to thank members of the public and the media for assisting in bringing this puzzle to a satisfactory conclusion."