A man who claimed he was armed tried to wrestle money from a 47-year-old's hands as he was at an Asda cashpoint, police said.
Offices are appealing to speak to a man pictured in CCTV images after the attempted robbery at in St Helens , on October 16.
The victim - a 47-year-old man - was trying to get cash from the Kirkland Street store before he was approached by an unknown man who threatened him.
Police said: "The man lunged at the victim and tried to wrestle the money out of his hand. The victim started shouting for help and the offender made off towards the Napier Street estate.
"The man is described as being white, in his 30s or 40s and around 6ft tall. He was of slim to medium build with short hair and a gaunt face and was wearing tracksuit bottoms and a dark coloured top.
"The victim was not injured but left shaken by his ordeal."
Anyone who recognises the man or can assist the investigation is asked to DM @MerPolCC, call 101 or contact Crimestoppers anonymously on 0800 555 111 quoting reference 19100601210.
