Police say they will charge a 26-year-old man with the murder of Grace Millane.
Earlier on Saturday Detective Inspector Scott Beard said Police had launched a homicide investigation into her disappearance and a man had taken in for questioning.
- Full video: Police address media over Grace Millane's murder
- Grace Millane murder: What we know so far
"The 26-year-old who has been speaking with Police in relation to the disappearance of Grace Millane will be charged with her murder," a police spokesperson said on Saturday night.
"He will remain in Police custody until Monday morning when he will appear in the Auckland District Court."
Ms Millane was last seen with the suspect last Saturday evening at the CityLife Hotel. It is unknown if she left there alive.
Det Inspt Beard said the 26-year-old had been found at an Auckland address.
"Sadly the evidence we have gathered to this point in this inquiry has established that this is a homicide," he said.
"He is currently speaking to us in relation to the murder of Grace Millane."
However her body and belongings remain missing, and police continue their search for evidence.
"Grace is still missing and we want to find her," he said.
"We still do not know where Grace is. We're determined to find her and return her to her family."