A courier picking up cash from the Wilkinsons store in The Arcade, Wigston, this morning was targeted by armed robbers.
The incident took place at about 10.15am, when the courier was approached by two men who threatened him before stealing a cash box.
One of the robbers is believed to have been armed with a crowbar.
The suspects made off with the orange cash box in a small blue Peugeot car, with the registration number M875 ODU.
This vehicle was later found abandoned a short distance away in the Leicester Road and Denmead Avenue area of Wigston.
The suspects were last seen running from the vehicle in the direction of Leicester Road and Bull Head Street.
The suspects are white, about 6ftand of stocky build. Both were wearing black balaclavas. One of the suspects was wearing a dark hooded top and the other had a grey hooded top.
Detective Sergeant Simon Head, from the Force Serious Crime Team, said: "The victim wasn't injured but understandably he was left extremely traumatised by the incident.
"The blue Peugeot may have been parked near to Wilkinsons and the Arcade in Wigston for some time prior to the robbery. If you were in the area around 10.15am today (Saturday February 7) or during the morning and saw anyone acting suspiciously then please come forward.
"There were a number of people in the area at the time and there's a strong possibility that someone may have witnessed the incident and possibly the suspects driving away from Wigston town centre.
"Likewise where the vehicle was abandoned on Leicester Road, if anyone saw the two suspects running away from the car, then please get in touch.
"If you've subsequently heard rumours locally about who may be responsible then we need to speak to you, even if you're not 100 per cent positive about the information you may have we would still like you to come forward as we can quickly eliminate any possible lines of inquiry."
Anyone with information is asked to call 101.