A police senior sergeant asked a bullying victim whether she had "period troubles", according to a report.
The victim, who spoke to Radio New Zealand, said she raised concerns about being mistreated, but bosses "brushed off" her complaints.
"It was the senior sergeant who asked the reason that you're so upset, is it because you've got period troubles?
"I was just frustrated, frustrated and angry because it made me realise my problem was not going to get resolved," the victim told RNZ.
It has been revealed another two women were also reportedly questioned about their period when they raised concerns about bullying.
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"Sixty-one people have now spoken to us about what they say is widespread bullying in the police," RNZ reports.
In a statement to Newshub, police said eight complaints had been received in 2019 in regard to workplace issues.
"Comments such as the one raised in the media this morning [Monday] are unacceptable," said Kaye Ryan, deputy chief executive of the Police's people and capability.
"We would urge those people to notify us through the Speak Up programme, via a trusted manager or colleague, HR, or their district commander.
"There is still a lot of learning to do, but we are committed to achieving better outcomes for our people."
Newshub.