Call crime stoppers if you have any information on the following:
Police in Sydney are looking for five men they say abducted and sexually assaulted an 18-year-old woman on Saturday night.
Police say the woman left a house party in Baulkham Hills, in the city's north-west, around 1:00am on Sunday and was walking alone.
Police spokeswoman Joanne Elliot says the woman was followed by a car with the men inside and they stopped to ask her for directions.
The teenager kept walking but was grabbed from behind a short time later.
"She's told police that she was dragged into the car now she has been sexually assaulted by several of those men and then was taken to Castle Hill," she said.
"A suburban area in Waterloo Avenue in Castle Hill is where she was dumped."
The car has been described as a green-coloured sedan, and the driver was around 25 years of age, with a chubby build, a beard and wearing a flanelette shirt.
Police say the men and the car were seen earlier in the evening outside the party the woman had been at. Anyone with information is urged to call Crime Stoppers on 1800 333 000.
