Police are appealing for help from the public to find missing woman Elizabeth Udy, known as Lizzie.
The 45-year-old was first reported missing on October 11 after she was seen around 3am in the Pahiatua township, near Palmerston North.
Udy is Caucasian, of slim build, and about 155cm tall. She was wearing a nightgown when she was last seen.
In a statement police said they believe Udy may have made her way to the Mangatainoka River by the Pahiatua Town Bridge.
"It is possible Lizzie may have entered the river on the boundaries of Pahiatua," the statement said.
"Despite a week of land and water searches, police have been unable to locate any sign of Lizzie or information concerning Lizzie's current whereabouts.
"Lizzie has not made contact with any of her friends or family and her bank and phone accounts remain unused."
Police said they do not believe Udy has access to a vehicle. If she has left Pahiatua she would have done so on foot, or would have been picked up by a car if she has travelled any great distance.
