A woman has been left shaken after she was robbed of a "large amount of cash", say police.
The incident happened at about 11:00 on Wednesday on Algitha Road shortly after the woman had visited the NatWest Bank on Grand Parade.
Officers say after taking the cash the male suspect jumped over a fence and ran through a garden into a car park behind some houses before getting in to a silver car.
Lincolnshire Police say they believe the suspect may have also visited the bank.
The woman was left shaken and received minor injuries.
Anyone with information about the incident is asked to contact police.