Detectives in Bolton are trying to trace a woman who came to the aid of a teenager who was being forced into a car.

At about 10.35pm on Monday 26 April 2010, the victim, aged 17, was walking along Hill Top, Little Lever.

A dark blue or black BMW, possibly an X6 model, pulled up in front of her.

The driver got out and walked onto the pavement. He then grabbed the girl and told her to get into the car.

As he was trying to force her into the car a woman approached them and pretended to know the victim, causing the offender to get into the car and drive off towards Dearden Street.

The offender is described as Asian, 5ft 10in tall, of stocky build and the backs of his hands were hairy. He was wearing a black hooded jumper and grey jogging bottoms.

Police are keen to speak to the woman who helped the teenager. She is described as white, about 18-years-old, 5ft 5in tall and was wearing a duffle coat.

Detective Constable Richard Willoughby, of Bolton CID, said: "We have made extensive enquiries since this incident but have not been able to locate the car or driver.

"I would appeal for anyone who recognises the description of this man to come forward and am especially eager to trace the woman who came to the aid of the victim. Had she not intervened who knows what may have happened."

Anyone with information is asked to call Bolton CID on 0161 856 5740, or the independent charity Crimestoppers, anonymously, on 0800 555 111.