Police are investigating after three G4S security workers were targeted in separate incidents on the same day.
The two robberies and one attempted robbery were all carried out in Glasgow on Friday between 9.40am and 2.30pm.
The first attempted robbery happened in the foyer of the Lloyds TSB Bank in Duke Street around 9:40am, when a G4S security guard was approached by two men who tried to grab a money cassette from him.
They then left empty handed and drove off up Armadale Street in a grey coloured VW Golf that had been parked across from the bank.
The first suspect is white, around 6ft tall, with a slim build and was wearing a dark coloured hooded top and trousers with dark coloured trainers.
The second suspect is around 5ft 8in tall with a medium build. He was wearing a light grey hooded top and black trainers.
A second incident then took place around 12.35pm outside the Scotmid store on Merkland Drive, Kirkintilloch when two men approached a G4S security worker.
Both men, who were in possession of a knife, subsequently grabbed the money cassette from the worker before driving off in the direction of Waterside in a Black Skoda Octavia or Superb.
Both suspects are described as white, between 20-25 years old with one wearing a two toned jacket and grey scarf and the other a blue hoodie.
The G4S worker was not injured as a result of the robbery.
The third incident occurred at around 2.30pm outside Ryman Stationary on Byres Road.
Again two men approached a G4S worker. One brandished a knife before demanding the cash box he was in possession off, with the second male carrying a 12-inch black pole.
Both suspect is described as white, 20-30 years old.
They then drove off with two other men in a black Volkswagen Golf, west on Downside Road in possession of the cash box.
Detective Inspector Clark Hill, of Glasgow CID said: “We cannot rule that these three incidents may be related however, all lines of enquiry will be considered.
“Each of these robberies has left the staff of G4S evidently shaken and we hope with the public’s help we will be able to catch those responsible.
“If you were in any of the three areas at the time of the incidents or have any information or dashcam footage that may help our investigation, please contact police.”