A 23-year-old woman was allegedly sexually assaulted while out running in Dunedin on Monday night.
Police say she was knocked to the ground, tied up and sexually assaulted near Ross Creek just after 9pm yesterday.
The offender fled the scene when a dog ran up to him. Police say the dog was in the area with no owner.
The scene examination is complete and police say they have forensic opportunities to pursue which could take some weeks, which is now in the hands of ESR specialists.
The woman did not get a look at the face of the attacker but he has been described as European, tall, and of a skinny build. He is believed to have been wearing black shoes, a black t-shirt, and a pair of black 'Skins' with white writing.
The area is popular with runners and dog walkers.
Police are keen to hear from anyone who was in the area or saw anything suspicious between 7pm and 10pm last night. They would also like to speak to anyone who was in the area with a light-coloured dog.
You can contact the Dunedin Central Police Station on 03 471 4800 and ask for Detective Sergeant John McDade.
Alternatively, information can also be passed on anonymously via the organisation Crimestoppers on 0800 555 111.