A woman reportedly "shouted for help" as she was dragged into a car in Hounslow .
The incident, in which it was alleged a woman was pulled into a car, is reported to have happened in Staines Road near Shaftesbury Avenue in Feltham at around 3.30am.
The female, whose age is not known, is described as white, wearing a green coat with fur trim around the hood.
A silver or grey, small to medium-sized car, was reported to have driven away from the location at the time.
Other details include the possibility of a man and woman already inside the car when the victim was forced into the vehicle.
A Metropolitan Police spokesman said: "It is reported that the woman was shouting for help.
"The car, which drove away from the location, is described as a small or medium-sized silver or grey vehicle.
"There may have been a man and a woman inside the car, in addition to the woman who was pulled inside."
Anyone with information that may assist the investigation is asked to call detectives from Hounslow CID on 020 8247 6157.
Alternatively, to provide information anonymously, contact Crimestoppers online or call 0800 555 111.
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