Auckland escort Carmen Thomas has been missing for over a fortnight.

The owner of the club where a missing escort worked said she had been sent threatening texts from a manager at her former agency.

Police say they are "preparing for the worst" after the discovery of a missing woman's car and say her work as an escort may have heightened her chances of coming to harm.

Police investigating the disappearance of Christchurch woman Emma Campbell warn she may never be found.

A $10,000 reward for information about missing Nelson man Leo Lipp-Neighbours has been extended for another three months.

Stefan Jensen, who suffers from mild dementia, disappeared on June 4 from his son's rural property in Pukekawa, 24km southeast of Pukekohe.