A schoolgirl kneed a man in the genitals and fled after he indecently assaulted her.
Police are looking for the man after the attack on Mackay St in Thames about 2pm on Tuesday.
"Our victim, a 16-year-old girl, was walking on the eastern side of Mackay St, towards Sealy St, when a man walking towards her suddenly stopped her and subjected her to an indecent assault," Detective Sergeant Martyn Hughes said.
"Keeping her wits about her, our victim has kneed her attacker in the genitals before fleeing and raising the alarm."
AdvertisementAdvertise with NZME.
The offender was described as a clean-shaven man in his late 20s with olive skin who was "reasonably tall" and wearing a black T-shirt and blue jeans.
Police have asked anyone with information about the suspect or the incident to either call Thames police on 07 867 9600 or anonymously contact the Crimestoppers organisation on 0800 555 111.
Police praised the girl's "presence of mind" in the situation.
Mr Hughes said police were speaking to local schools to discuss safety issues.