Police in London searching for missing 33-year-old Sarah Everard have found what appear to be human remains in southeast England.
However, London police chief Cressida Dick has said that it was too early to confirm the identity of the body.
The discovery was made in an area of woodland in Ashford in Kent.
"We have found very sadly what appears to be human remains," Ms Dick said.
"At this early stage we are not able to confirm any identity and that may take us some considerable time.
"Specialist officers have been with Sarah's family to update them on the investigation and continue to give them the best support possible."
The Met Police announced earlier that a diplomatic protection officer held over the disappearance of Ms Everard has been arrested on suspicion of murder.
The Metropolitan Police said the man, who is in his 40s and is part of the Parliamentary and Diplomatic Protection Command, was being questioned over suspected kidnap and murder.
Marketing executive Ms Everard vanished while walking home from a friend's flat in south London on Wednesday, 3 March.
Late yesterday, the Met Police said a serving officer from the force had been arrested as part of the investigation, but in an unusual step would not reveal what he had been detained for.
Today, the force said he had been initially arrested on suspicion of kidnap, and later murder. He was also being questioned about a separate allegation of indecent exposure.
The police searches in Kent saw a tent erected at the front of a house in Freemens Way in Deal, where multiple cars were taken away by investigators. Later, a metal fence was put up surrounding the front garden and driveway.
Downing Street said Prime Minister Boris Johnson's thoughts are with Ms Everard and her friends and family.
His official spokesman told journalists at a Westminster briefing: "As investigations are ongoing on this case I can't comment.
"But the Prime Minister's thoughts are with Sarah and her friends and family."
Speaking at Scotland Yard this morning, Assistant Commissioner Nick Ephgrave said that detectives are working "at all speed" to find out what has happened to Ms Everard, and repeated appeals for members of the public to come forward with information.
Turning to the 33-year-old's family, who along with her friends have issued desperate appeals for help via social media, he said: "As a father myself, of four young women, I can only imagine the anguish that Sarah's family are feeling at this very very difficult time."
Ms Everard is thought to have walked through Clapham Common towards her house in Brixton - a journey which should have taken around 50 minutes.
She was last captured on a doorbell camera walking along the A205 Poynders Road towards Tulse Hill at around 9.30pm on 3 March.
Yesterday evening, police put up a cordon outside a block of flats near where the footage was recorded.
The search was focused on the Poynders Court housing complex on Poynders Road, and forensics officers could be seen examining the area.
Sniffer dogs were also used to search the nearby Oaklands Estate and gardens in surrounding streets, while other officers were lifting covers and searching drains along the A205.
The Met said it had received more than 120 calls from the public and had visited 750 homes in the area as part of the investigation.
Mayor of London Sadiq Khan said: "First and foremost I think all of our thoughts would be with Sarah's family, her parents and her siblings and her friends.
"It must be awful for them, they are in our thoughts and prayers. Actually Sarah went missing from near to where I live and we've seen, my wife and daughters walking around, the posters her friends have put up and it's heart-breaking, it's heart-wrenching."
He said he is in regular contact with the Met Commissioner Dame Cressida Dick about the investigation.
