Australian police have released CCTV images of Irish woman Jill Meagher, taken minutes before her suspicious disappearance in Melbourne in the early hours of Saturday morning.
Detectives hope the images, captured in the Brunswick area of the city, will help with their investigation.
They say that they are not ruling out the possibility that Mrs Meagher was abducted.
The CCTV footage shows six people walking near the 29-year-old Drogheda native prior to her disappearance.
They have been urged to come forward.
Detective Inspector John Potter, who is leading the investigation, said police are keen to talk to a man who appears to be talking to Mrs Meagher in the footage.
He said: "We're interested in talking to anyone that was in the Sydney Road area in the early hours of Saturday morning and may have seen Jillian, or indeed anyone that knows who the people in the footage are."
They are "particularly interested in talking to a man in a blue top that's depicted in the footage who appears to be talking to Jillian".
Detective Inspector Potter told journalists that detectives did not know whether the man knew Mrs Meagher, but that it appeared to be a casual conversation.
He said they have not been able to rule out abduction and said "in fact we are looking more and more at that as a possibility".
Husband not treated as suspect
The apartment that Mrs Meagher shared with her husband Tom was searched twice yesterday, but Mr Potter said that Mr Meagher is not being treated "in any way" as a suspect and there are no suspects at this stage.
Police said they have grave concerns for Mrs Meagher's safety five days after her disappearance.
Mr Potter added: "She hasn't been heard of since the early hours of Saturday morning and it's now Wednesday. She hasn't accessed her bank records since that time.
"There's been no word from her mobile phone and with all the media coverage on this, we do hold grave concerns for her welfare."
Police launched a major investigation after Mrs Meagher went missing and they say they are working through hours of CCTV footage.
Mr Potter said: "Investigators are continuing to work through a large amount of CCTV footage.
"We're also conducting other inquiries and investigations. We currently have 140 calls to Crimestoppers, which we need to scrutinise thoroughly."
Mrs Meagher is known to have phoned her brother in Perth from 1.43am-1.45am local time just after the footage ends.
The handbag she is seen carrying in the footage was found in a nearby lane on Monday morning and police believe it may have been planted there.
