Police are investigating the discovery of a human head in a quarry in Cambridgeshire.
It was found in the small village of Mepal, near Ely, by a staff member at the quarry on Monday afternoon.
An unnamed quarry worker has told the Bedfordshire On Sunday news outlet that his colleague found the remains when he took the cover off a skip he had just transported back to the site.
The worker said: "He took the cover off and spotted something straight away."
He went on: "His first thought was that it was a mannequin's head.
"But then he realised it had eyebrows and hair, and suddenly clicked that it was actually a woman's head.
The head was found at a quarry run by Mick George Ltd
"He said it had blood all over and was covered in dirt, but didn't look like it had disintegrated."
The colleague is said to have described the features as looking female and possibly in her 30s or 40s.
Police have not confirmed whether the head is from a man or a woman and they have yet to learn how long it had been there.
Officers stressed that it was a human head that was found, not a skull.
Detective Inspector Jerry Waite, from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, said: "We are conducting enquiries both locally and across the county borders, and would urge anyone with information about the finding to contact us.
Enquiries are taking place 40 miles away in Sharnbrook, Bedfordshire
"At this stage we do not know if the head is male or female, however we have got officers carrying out searches at a site in Sharnbrook, Bedfordshire, as we believe this is where the remains may have come from."
A spokesman for Mick George Ltd, the company that runs the quarry, said: "We are working closely with the police and providing them with all the information they need to undertake their investigations.
"At this point we cannot provide any further comments."
The site is used for landfill, recycling and mixing cement. It is also used for the supply of various materials including limestone and gravel.