Five masked men stole a large sum of cash after forcing their way into a convenience store in Surrey and threatening two members of staff.
Police said three of the men who raided Budgens in Cobham Road, Fetcham, on Monday were armed with weapons thought to be an axe, a hammer and a knife.
"Thankfully no-one was injured but this was a terrifying ordeal for the staff members," said Det Con Alex Paul.
The men fled in a black Audi RS after removing four till trays of cash.
Treated for shock
It is thought they headed in the direction of The Street.
Police believe the vehicle, which had stolen number plates, had been parked in three different locations in Cobham Road for more than 20 minutes before the robbery at 2210 BST.
The staff members, both men, were treated for shock by paramedics called to the scene as a precaution.
Police have carried out house-to-house inquiries in the area and are viewing CCTV of the scene.
They appealed to anyone who saw the Audi before or after the robbery to come forward.
Officers also want to speak to anyone who saw the men entering or leaving Budgens who has not yet been interviewed.