Three men armed with a claw hammer and a crow bar raided a village post office.
The men escaped with cash from the shop in Canal Street, South Wigston at 3pm yesterday.
No members of staff or customers were injured, police said.
A Leicestershire Police spokeswoman said: "Officers are investigating a robbery at a premises in South Wigston.
"Three suspects entered the premises with what was described as a crowbar and a claw hammer and demanded money.
"The suspects left the premises with a quantity of cash. No one was injured."
Information can be passed to police on 101 or Crimestoppers, which is anonymous, on 0800 555 111.
