Police have released a CCTV image of the last known sighting of a missing British backpacker as a desperate search continues.
Grace Millane, 22, was staying at Base Backpackers in Auckland, New Zealand, but has not contacted her family since Thursday.
She was last seen on Saturday and has not been heard from since.
She had previously kept in daily contact with her family, who are from Billericay, Essex, and has not been active on social media despite celebrating her birthday on Sunday.
In the CCTV still, taken at 7.15pm on Saturday, Ms Millane can be seen at entertainment complex Sky City.
She is believed to have been in New Zealand for about two weeks and police said they are growing increasingly concerned for her welfare.
Detective Inspector Scott Beard, of Auckland City Police, said Ms Millane's father was on his way to New Zealand, and said her family were understandably "distraught".
"Clearly this is a very stressful time for Grace's family and the longer she remains missing, the more our concern grows for her safety and wellbeing," he said.
A number of unconfirmed sightings have been reported to detectives
Members of Ms Millane's family have shared appeals for information on Facebook, and Mr Beard said more than 20 staff were working on the case.
Her brother Michael Millane, 29, said the family are worried and her disappearance is “totally unlike her”.
He said: “Grace travelled to South America six weeks ago as part of a group tour, before going to New Zealand two weeks ago.
“We last had contact with her on Thursday, but it had been daily before that.
“The last contact anyone else had with her was on Saturday, when her roommates asked what she was doing with her day.
“They were the last people to see her and said she seemed fine.
A spokesman for the Foreign Office said: "We are providing consular support to the family in the UK, and working with the New Zealand Police in relation to reports of a missing British national in New Zealand."