A man will be charged with the murder of 22-year-old British backpacker Grace Millane, New Zealand police have confirmed.
Police said they were questioning a 26-year-old man about the suspected slaying of 22-year-old Grace Millane and a vehicle of interest had been secured.
They said that several of Ms Millane's possessions, including her passport, were missing.
Det Insp Scott Beard said evidence they had located so far told them Grace was "no longer alive".
"I know that the thoughts of all New Zealanders will be with Grace's family tonight", Det Insp Beard said.
Police want the public to help find this necklace belonging to backpacker Grace Millane.
Images of her pale pink watch and silver necklace were released by police after it was noted they were missing from her belongings at the backpackers' hostel where she was staying.
He said Millane's family had been told and they were "devastated".
Meanwhile, the scene examination at the Citylife hotel is continuing as detectives review hundreds of hours of CCTV footage.
Ms Millane (pictured) arrived in New Zealand on November 20.
DI Beard said the investigation into Grace's disappearance was "progressing rapidly".
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Despite a major police search and public campaign for information, no further sightings of the backpacker have been confirmed.
"I want to reassure everyone, both here and overseas, that New Zealand Police are determined to do everything we can to find her". He also said investigators were looking into her credit card activity to see the last time she made a transaction.
A CCTV image shows she was at Sky City, a hotel a short distance away, at 7.15pm on the same night - but her whereabouts between those two sightings is unknown.
He said: "I would just like to take this opportunity to appeal to anybody who has seen, spoken to or come into contact with Grace over the last few days to come forward with any detail, no matter how small, and contact the investigation team".
Photos on her Instagram showed she travelled to Cape Reinga with friends before returning to Auckland.
Ms Millane, from Essex, was described as a "lovely, outgoing, fun-loving, family-orientated daughter" by her father, David Millane.
This was her first time travelling overseas alone.
A spokesman for the Foreign Office said: "We are providing consular support to the family in the United Kingdom, and working with the New Zealand Police in relation to reports of a missing British national in New Zealand".
An emotional Beard said it had been a tough time for all involved in the investigation.
Millane's father David, a millionaire property developer, flew into New Zealand early yesterday.