A crook can be heard screaming at Post Office workers in a terrifying gun raid filmed on the mobile phone of a passer-by.
The dramatic footage emerged as police appealed for help tracking down the gang behind the robbery.
One man can be heard shouting, “Open the door or I will f***ing shoot you” as he screams orders at staff.
Three men forced their way into the Burscough Bridge branch on Thursday afternoon, according to detectives.
At least one was armed with a gun as they targeted the shop at around 5.30pm - sparking a response by armed police.
A car thought to have been involved was later found burned-out
The video shows a man, dressed in black, stood in front of a female member of staff while the shocking threats are made.
Read more: Postmistress suffers heart attack as she fights off armed robbers
The images, recorded by a passerby, also show the shattered glass of a Post Office door, reports the Liverpool Echo.
The man who took the footage can be heard warning others that one of the men has a gun before his video captures someone running from the shop.
A car thought to have been involved was later found burned-out by the nearby The Ship Inn pub at Lathom.
A Lancashire Police spokesman said: “At around 5.30pm this evening [Thursday] three males forced their way into the Post Office in Burscough.
“At least one of the men was in possession of a firearm.
“They threatened staff and made off with cash in a silver Honda which was later found abandoned nearby.
“No-one was hurt in the incident.
“We are asking anyone with any information about the incident to contact us on our non emergency number 101 and quote log number 998 from today [Thursday].”