Robbers threatened the driver of a cash in transit van with a hammer and stole cash outside McDonald’s in Gainsborough on Monday.
Police were called to the fast food restaurant on Trinity Street at around 9am.
The attack happened in broad daylight as customers were enjoying their breakfast inside.
A spokesman for Lincolnshire Police said: “Police were called to McDonalds in Trinity Street, Gainsborough just after 9am on Monday following reports that offenders had threatened the driver of a cash in transit van with a hammer and stolen cash from the van.”
“Police attended the scene and are currently conducting investigations.”
“The driver of the cash van was not injured.”
Detectives are now seeking information about the car used by the offenders to leave the scene.
“It is believed to have been a late model dark coloured Ford Focus with an 05 registration plate that had been stolen from an address in Gainsborough over Sunday night or during the early hours of Monday,” the spokesman added.
“It was driven away from the scene down Trinity Street and into Tooley Street.”
McDonald’s customers spoke of their shock that the robbery took place at such a busy time of day.
One customer eating outside the restaurant, who did not wish to be named, said: “It all happened at about 9 o’clock.”
“We got here just after it happened but I have heard that they threatened the driver with a hammer and demanded money.”
“What makes people do something like that? They must be really desperate to risk doing it with so many people around.”
Another customer added: “Things like this seem to be happening more and more, but I still can’t really believe it.”
This robbery comes just two weeks after an attempted robbery on the St Barnabas Hospice charity shop on Church Street in the town centre.
In that incident the offender demanded that a female shop assistant open the till, before hitting her in the face. He fled empty handed.
McDonald’s declined to make any further comment on the attack, saying that matters had been left in the hands of the police.
Lincolnshire Police are now appealing to any possible witnesses to the robbery to get in touch, especially anyone with information about the car.
Witnesses are asked to contact Lincolnshire police on 101 quoting incident number 91 of 29th July.
Alternatively, call the charity Crimestoppers anonymously on 0800 555111.