Police are releasing a CCTV image as our investigation into the disappearance of 22-year-old English tourist Grace Millane continues.
A British backpacker who was staying in an Auckland hostel has been missing for five days.
Her family in the United Kingdom raised the alarm on Monday and Detective Inspector Scott Beard said her disappearance was "out of character".
The University of Lincoln graduate, from Billericay in Essex, has not been in contact with her family for several days, including on her birthday on Sunday.
They said Miss Millane had booked to stay at the Base Backpackers hostel in central Auckland until 8 December.
Newstalk ZB reporter Chelsea Daniels attended the Police press conference and told Larry Williams the longer it carries on without any sightings, the more worrying it is.
She was last seen in Auckland.
"It's important that anyone who recognises Grace from this photo or saw her on Saturday night contacts Police immediately".
Before heading to New Zealand, she was in an organised group heading through South America for six weeks.
She is about 5ft 6in tall with brown hair and brown eyes.
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"We are working closely with her family at this time and a number of Police staff are now working on this matter".
Michael Millane pleaded for his sister to contact the family.
Beard said Millane's father was on his way to New Zealand.
"At the moment, we don't have any evidence of foul play, but we keep an open mind", Detective Inspector Beard said.
However she was travelling alone when she came to New Zealand about two weeks ago. He said they were waiting for the British banks to update them on when Grace Millane's credit cards were last used.
Base Backpackers declined to comment.
Tony McLeod, consular manager at the British High Commission in Wellington, said the commission were providing consular assistance to the family back in the UK.
Her family reported her missing to New Zealand Police yesterday.
Members of Grace's family have shared appeals for information on Facebook and more than 20 police are working on the case in Auckland.