Police are appealing to a man who might have seen an "incident" in Droitwich.
It happened on Monday, April 27 on St Andrews Road.
A spokesman for West Mercia Police said: "The incident took place in the carpark next to Panda Chinese Restaurant at around 5.30pm.
"The victim was parked in a Citroen C1 when the offender approached her car and grabbed her wrists and threatened her - the girl beeped her horn to gain attention and a man stopped to ask if she was ok before the offender shouted at him."
Anyone with information is asked to call Leanne Pickering on 101, quoting reference 515s 270420.
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