Detectives are hunting a “calm and collected” robber who held up off-licence staff in a frightening late-night knife raid.
The masked man stole £250 from Premier Wines, on Torsway Avenue, Layton, after targeting two women as they were closing up for the night on Friday.
He pulled out an eight-inch blade before demanding cash from the till.
Det Sgt Kathryn Riley, of Blackpool CID, said: “As knife-point robbers go, he was described as being quite polite.
“Obviously, he has got a knife but he was very calm and collected.
“He didn’t go in there shouting and screaming.”
Police are now appealing for help to locate the weapon and a green ski mask the offender used to cover his face.
Det Sgt Mark Dickinson said: “The two women were both very shaken up but thankfully uninjured.
“An investigation is under way and we are investigating forensic opportunities.”
The robber is described as white, 5ft 8in tall and of slim build.
He was wearing dark clothing as well as the mask, which covered his head and face. It is not known which direction he travelled in after his escape.
Det Sgt Dickinson added: “We’re appealing to anybody who might have seen someone in that area at the time in the clothing described to get in touch as he may have discarded the weapon or clothing.”
Anyone with information is urged to call police on 101.