Police are looking for witnesses to two sexual assaults in Rotorua on January 21.
The two separate crimes are believed to be linked.
In the first incident, a woman who identified herself as ''Ann'' became worried for the welfare of a 22-year-old woman at the lakefront village green adjacent to Pizza Hut, about 7.45pm.
It is believed the 22-year-old woman was sexually assaulted and police would like to speak to Ann as a potential witness.
About the same time on the same night a 15-year-old girl was assaulted in the male toilets at the lakefront next to Pizza Hut.
Police are investigating a possible second sexual assault in the male toilets at the lakefront next to Pizza Hut on the same night, about the same time.
A couple reported what they believed to be a drunk male in one of the toilet cubicles to police about 9.15am.
Police now believe it was a 15-year-old girl who had also been subjected to sexual assault and police would like to speak to the couple again as potential witnesses as soon as possible.
The witnesses and anyone else with information is asked to contact Detective Owen of the Rotorua CIB on 021 191 3601.
Information can also be provided anonymously to the organisation Crimestoppers on 0800 555111.