THIS is the shocking moment a thug pulls a weapon on an unsuspecting shop worker before robbing a Post Office for tens of thousands of pounds.

Police have released the disturbing footage as they continue their investigation into the assault and robbery, which took place at the Stonedyke Post Office on Bearsden's Spey Road on May 6 this year.

The footage appears to show the man brandish a gun before threatening the man in the store.

The force previously revealed he made off with a five-figure sum of cash on a dark-coloured mountain bike.Glasgow Times: Police want to speak with this manPolice want to speak with this man

READ MORE: Bearsden post office worker threatened with gun in robbery

It's believed he stashed the money in a black JD Sports branded drawstring bag.

Upon releasing the footage, a spokesperson for the force said: "Police have released images of a man they would like to speak to who may be able to help with their enquiries in connection with an assault and robbery which occurred at around 2.15pm on Monday, May 6 at a shop on Spey Road in Bearsden." 

He is described as white, around 5ft 7- 5ft 9 and in his late 40s, early 50s.

Glasgow Times: The incident took place on Spey Road in BearsdenThe incident took place on Spey Road in Bearsden

He was wearing blue overall style trousers, a dark blue oil skin jacket with a hood, a navy tammy hat, black gloves, and a silver/white neckerchief.

He also had on grey trainers with a white sole.

Anyone with information is urged to call 101.