A HUMAN skull and part of a spine were among the remains found by a dog walker on a quiet road, the Evening News understands.
A week on from the grim discovery near Five Sisters Business Park, the area is still sealed off by an extensive police cordon.
Police have confirmed that the remains are human and said a bid was under way to identify the deceased.
The woman who found the bones uncovered the “pile” while taking her dogs for a walk last Thursday.
A source close to the woman, who asked not to be named, said she had contacted police after fearing they were human remains.
Among them was a skull and other bones, including what is believed to be a part of a spine. They were found in the undergrowth beside the B7015 road, where the “white stood out against the brown”.
It is understood that the dog walker was interviewed again by police yesterday about the harrowing discovery.
Detective Superintendent Kenny Graham said: “This has been a painstaking process to recover the remains and we now await the results of scientific analysis.
“I am keen not to cause any unnecessary distress to families or anyone who is waiting for news of a missing loved one, and my officers will be in contact with the next of kin of any person who becomes relevant to the investigation.
“We will be continuing to conduct examinations with various scientific experts and specialists to establish the circumstances of the death, and so the area near West Calder will remain closed off whilst this takes place.”
The B7015 between the C13 at Blackburn and C26 at West Calder continues to be closed apart from for local access.
The discovery is believed to have been made in the middle of the sealed-off section, which is lined by trees and cannot be seen from the business park.
Police vans have been stationed at either end of the cordon throughout that period while investigations are carried out.
The prolonged closure of the B7015 has been disrupting traffic, as it is the main route from Stoneyburn and Fauldhouse to Livingston.
Eastbound motorists are being diverted towards Seafield and along the A705 to Livingston while westbound travellers can go via West Calder and Addiewell and follow the B792 round to its junction with the B7015.
The Five Sisters Business Park is home to a variety of businesses, including the Forestry Commission, a joinery firm and the offices of coach company Prentice Westwood.