A man demanded cash from a 57-year-old woman as she sat in her car in Bradford.
Police are appealing for information following the attempted robbery on Lemon Street at about 6.15pm on Sunday.
A police spokesman said the woman was approached by a man who made demands for money.
He struggled with the woman before running off empty handed. The woman was uninjured.
The suspect is described as white, in his late teens to early 20s, about 5ft 10ins and of slim build.
Anyone with information is asked to contact police on 101 or Crimestoppers on 0800 555111.
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