Police were today still hunting a second man in connection with a terrifying knife-point raid in Blackpool.
A female cashier was left shaken but unhurt following the robbery at Ladbrokes, on Whitegate Drive.
Police arrested one man after a customer, who was in the shop at the time, gave chase.
The man is currently in hospital, with an unrelated health complaint, and police are waiting until he is discharged to interview him.
However, a second man got away and detectives are still working to identify him.
The man they are hunting is thought to be white, in his late 20s or early 30s and has dark hair.
Shortly after 4.30pm on Thursday, police were called to a knife-point robbery in progress at the bookmakers.
Detectives say the men entered the store before one approached the cashier and pulled out the knife.
He then made verbal threats before leaping over the counter and stealing money from the till.
Det Sgt Simon Pritchard, of Blackpool CID, said: “This must have been very traumatic for the female cashier to be threatened with a knife like that.
“We are appealing for any witnesses that may have been in the area at the time and saw anybody acting suspiciously.”
A number of witnesses, who were inside the bookmakers at the time, have already been interviewed by police.
A 33-year-old man was arrested on Thursday on suspicion of robbery.
He was last night in hospital under police protection.
Investigations are on-going to identify the second offender.
Anyone with information is asked to call police on 101, quoting log number 946 of July 2.