A woman has been attacked after she was approached by a man claiming to be a taxi driver.
Police say she was walking home early on 6 November along Downend Road, Staple Hill, Bristol when the black or blue four-door saloon car drew up.
When the woman carried on walking the man grabbed her by the neck and tried to drag her back to the car but drove off after two passers-by intervened.
He is described as of Asian appearance, late 30s, 5ft 10ins, and of slim build.
The man had short dark hair with a fringe, was clean-shaven and was wearing a dark long-sleeved round-necked T-shirt with dark blue jeans.
Officers say they would particularly like to speak to the two men who came to the woman's assistance.