A $50,000 reward for information on the disappearance of Luana Williams has expired and the case is still unsolved.
The reward was offered in November for material information or evidence which led to her being found or the conviction of a person responsible for her disappearance or death.
Inquiries into her disappearance in Tauranga nearly 28 years ago would continue, police said.
"We did receive a number of calls during that reward period and as a result of those calls and a number of inquiries we have received some useful information," Detective Inspector Mark Loper said.
"The reward phase did not result in any additional persons of interest being identified over and above those already within the investigation."
Luana Deborah Laverne Williams was last seen on June 5, 1986, at her home in Munro St, Tauranga.
Anyone with information relevant to Operation Williams was asked to contact Tauranga Police on 07 577 4300. Information could also be provided anonymously to Crimestoppers on 0800 555 111.