A robber made off with thousands of pounds of foreign currency in a raid at a travel agents after threatening a pregnant member of staff with a knife.
The attacker entered Thomson travel agents, on Park Road, St Annes, before demanding cash from shocked staff, including the pregnant woman, while brandishing a kitchen knife.
He fled with around £2,500 in Euros and US dollars, and then is believed to have run off down an alleyway opposite the shop.
It comes as detectives also made appeals to trace another robber who targeted a bank and a shop in Blackpool.
Speaking about the St Annes incident, Det Sgt Mark Dickinson, from Blackpool CID, said: “The staff were very shaken.
“One of the staff members was pregnant and she was quite upset.
“Nobody was injured thankfully.”
The robbery happened at around 9.10am on Saturday, and detectives are now appealing for witnesses to help catch the raider.
He is described as white, in his 40s or 50s, 6ft tall and of slim build.
He had a scruffy appearance and may have been wearing glasses.
Det Sgt Dickinson added: “We believe the suspect was wearing surgical gloves and would appeal for anyone who comes across a used pair in that area to contact us immediately.
“We’re going through CCTV from the branch and nearby property.
“There is an extensive operation under way, but if there are any witnesses who may be able to help us find out the direction the suspect travelled in we’d appeal to the me to come forward.
“We’d also be interested in speaking to anybody offered foreign currency in exchange for sterling.”
Passengers on the train bound for Blackpoool South, which arrived in St Annes at 9.05am, are also being sought as it is believed the offender may have been aboard before carrying out his attack.
The shop was previously targeted in a similar robbery in February 2010, when a man with a knife made off with a “substantial” amount of foreign currency.
However, the two are not being linked.
The incident is not being linked to two other robberies in Blackpool on Friday, the first of which took place at 4.15pm.
In the first incident at the NISA shop, on Easington Crescent, Grange Park, a man produced a note to a worker telling him he had a weapon and demanded cash.
The worker then shouted for their boss, at which point the attacker grabbed the note and fled empty handed.
Around 25 minutes later a similar incident occurred at the Royal Bank of Scotland, on Bond Street, South Shore, where an offender again produced a note with similar demands.
He made off with less than £1,000 cash in that instance.
CCTV images are currently being studied of the suspect and detectives are working with forces from across the region to identify him.
Call police 101.