Police have served search warrants on residential and business addresses in Auckland's Papatoetoe ward as part of an inquiry into electoral roll enrolment irregularities around the upcoming super city elections.
Detective Inspector Mark Gutry, crime manager at Counties Manukau Police, said the search warrants were executed at "properties of interest" over the past two days.
Up to 40 officers were involved, and candidates and campaign staff would also be contacted for information.
The Registrar of Electors last week removed 306 enrolments after discovering people did not live at addresses stated on enrolment forms.
"Police are very aware of the electorate interest in this inquiry and we are working to complete it as thoroughly and quickly as possible," Mr Gutry said.
"It's too early to say what the outcome of our investigation will be," he said.
"Elections and the right to vote are part of New Zealand's democratic process. If people do have concerns about irregularities in the Papatoetoe ward then it's important they have the confidence to speak up and get in touch with us," Mr Gutry said.
Anyone with information should contact Counties Manukau Police.
NZPA