The body of Joanna Yeates, 25, was discovered on Christmas Day in Longwood Lane in Failand near Bristol. She had been strangled.
Police have confirmed they are investigating claims murder victim Joanna Yeates was outside her flat with two people on the night she vanished.
The landlord of the property in Bristol has told detectives he saw three people leaving and believes one of them was 25-year-old Ms Yeates.
Crimestoppers has offered a £10,000 reward for information leading to the arrest and conviction of her killer.
Ms Yeates’ body was discovered on Christmas Day. She had been strangled.
The discovery was made in Longwood Lane, in Failand near Bristol, by a couple walking their dogs.
Detective Chief Inspector Phil Jones said: “There are a number of lines of enquiry we are following up.
“One of these concerns apparent reports that several people were seen or heard in or around Joanna’s flat on the night of her disappearance.”
Officers have also removed the front door to Ms Yeates’ flat in Canynge Road as part of the investigation.
A police spokeswoman said: “The door is being taken for forensic analysis.”
Ms Yeates’ was last seen alive on 17 December.
Joanna Yeates’ body was found on Christmas Day She is believed to have returned to the flat she shared with her boyfriend Greg Reardon in the Clifton area of the city after an evening at the Ram pub, on Park Street.
Her keys, mobile phone, purse and coat had been left behind at their flat and forensic examiners have said there was no sign of a forced entry or a struggle at the property.
Mr Reardon reported her missing to police on 19 December when he returned home from a weekend visiting family in Sheffield.
Police have now issued CCTV images of Ms Yeates at a Bargain Booze shop in Clifton where she bought two bottles of cider on the night she disappeared.
The bottles – one of them half drunk – were found in her flat.
Images of her visiting a Waitrose store and a Tesco Express store in Clifton, after leaving the Ram have already been released.
Mr Jones said: “We know that there were a number of people in the Canynge Road area on the night of Joanna’s disappearance.
“We want to hear from any of these people or anyone else with information that can help the enquiry.
The front door of the flat was taken away for tests “We have, of course, been keeping in contact with Joanna’s family and keeping them informed of our progress.
“Late last night, I received a message from Mr Yeates in which he stated he and his family had “total confidence”.
“Indeed, Mr Yeates said ‘we truly believe that you will identify the person who killed our daughter’.
“I am, of course, grateful to have the support of the family.
“They, and the general public, can rest assured that myself and my team will leave absolutely no stone un-turned in our attempts to find whoever killed Joanna and to bring them to justice.”
Police have said post-mortem results showed she had been dead for “several days before being discovered”.
They are now trying to fill in the gaps between her disappearance and Christmas Day when her body was discovered.
Officers particularly want to hear from anyone who saw anything suspicious around the entrance to Durnford Quarry, close to where she was found, between 17 and 19 December.
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