Police are out in force in East Auckland to try to track down a serial cross-dressing flasher with a penchant for lacy lingerie.
Counties Manukau East police said they were investigating several reports of a man exposing himself to members of the public.
The man has been seen by witnesses several times naked, or wearing items including dresses and women's underwear.
He is described as a 40 to 50-year-old European with black hair and has been seen at Macleans Park, Pigeon Mountain Reserve and the Pakuranga Rotary Walkway.
A 21-year-old school teacher who wished to remain anonymous, fearing the suspect might recognise her, saw the man three times at Macleans Park.
She was walking with a friend late last year when she "saw him running in a stuffed bra and women's undies".
The same man casually walked past her again last month, this time wearing nothing.
"We saw him and he was fully naked - it was traumatising."
Then two weeks ago she was walking her dog when the suspect jumped out at her.
"I saw the man peering out from a bush - he was fully clothed wearing blue shorts and a grey T-shirt," she said.
"But as soon as I walked past him he jumped out naked, right in front of me, said, 'hi', and then pretended he was going for a run.
"I kept walking, but the most awkward thing was when I looked back, I caught him looking back at me."
She reported the incident to police.
Acting Inspector Al Symonds, of Counties Manukau East police, said the man was not seen as a danger, but his behaviour "caused alarm".
"What people do in the privacy of their own home is their own business, but we urge this person to come forward to police as soon as possible given the various public places which he has been frequenting."
Symonds said the public could help by doing some of their own detective work.
"Do not confront him and, if you are able, obtain a photograph of the man's face and any vehicle he is associated to," he said.
Investigations were under way and some people will be spoken to in relation to the incidents.
Police are also increasing patrols in the area including covert patrols on bikes and on foot.
Police urged the public to call 111 if they saw the man and stressed there was no immediate threat of assault to anyone.