Human remains found around train tracks in an area of Hull are "at least seven years old", police have now said.
Detectives have sealed off the area near to Brackley Park in the city over recent days after the grim discovery earlier this month.
Initial reports suggested the parts had been found " scattered" in different parts, although the squad investigating now say they are combing a "single, isolated" spot around a rail embankment.
Since they were discovered 12 days ago on the evening of Wednesday, December 7, the remains have been sent off for analysis as a team in forensics suit continue to search the area.
British Transport Police, who are leading the probe due to the location of the scene by a railway line, have also confirmed they were only looking at the death of one person.
Details of the person who tragically died are yet to be released, but the force said on Monday they had likely been dead since 2015 at the earliest.
“It’s a small area of land that the public do not have access to. Not the park, as has been reported," BTP Detective Superintendent Stephen May said.
“We believe they are the remains of one person and detectives await the outcome of a post mortem examination to identify them and establish the circumstances behind their death.
“At this stage we are unable to confirm how long the bones have been there, however it is estimated to be in excess of seven years.
“A cordon will remain in place while we continue searching the area, and we would like to thank residents for their patience while we carry out our final assessments of the site.
“I understand that there has been some local concern around this incident and I would like to reassure the community that we don’t believe there is any wider risk to the public.”
Earlier reports suggested police suspected the remains were from a person who had been hit by a train on the nearby rail track, although BTP has refused to confirm this.
The line is used by freight trains carrying goods from nearby Hull Docks.
Local residents have meanwhile told of their horror at the discovery, which was on land near to a park frequented by children and dog walkers.
"We have lived here for 11 years and walk our dogs everyday, if not twice a day, in that park," one mum told Hull Live.
"It comes as a shock that something like that would happen on our doorstep."
