A pensioner was robbed moments after withdrawing cash from an ATM machine.
The 68-year-old withdraw the money from Barclays Bank on Northgate, Cleckheaton, at around 10.30am on Friday.
As she walked away, a man approached her from behind and demanded she hand over the money.
He then snatched the cash out of her hands and ran off.
Police said the woman was left shaken by the incident but not harmed physically.
The man is described as white, in his mid 20s and of slim build.
He is around 6ft 2in tall and has dark hair.
Anyone with any information should call Kirklees CID on 101 or Crimestoppers, anonymously, on 0800 555111.