Armed robbers targeted a Spar store twice in the gap of four days earlier this month.
The incidents took place at the Spar on Blakiston Street in Fleetwood, with knife-wielding men stealing money from the store.
Lancashire Police said they are looking looking into the possibility of a link between the two robberies.
“We are in the early stages of our investigations but are looking into the possibility the two incidents are linked,” said DC Steve Wood of Lancashire Police.
The first incident happened on 15 February at around 8:10pm when the offender walked to the till with his face covered. He threw a yellow plastic bag at one of the workers, ordering for it to be filled with money, before producing a knife.
One of the members of staff handed the cash to the offender and he ran out of the shop.
The second robbery happened four days later at around 6pm on 19 February.
It was reported that a male offender entered the shop and jumped onto the counter whilst holding a knife. He grabbed notes from the open till and jumped back over the counter before leaving.
Detectives are appealing for information from the public.
“This shop has been targeted twice in less than a week and the shop workers have obviously been left very distressed by what has happened,” Wood said.
“If you have any information at all that could help, please get in touch as soon as possible.”
Anybody with relevant piece of information can email [email protected] or call 101 quoting log number LC-20200215-1487.
Alternatively independent charity Crimestoppers can be contacted anonymously on 0800 555 111.