The men escaped in a car with false license plates, following the robbery of the Ica Maxi supermarket, during which they fired shots into the store. Police have so far been unable to locate the culprits.
"Nobody was injured, but it was obviously a very unpleasant experience, police spokesperson, Mikael Eriksson, told news agency TT.
In another armed robbery which took place in Gothenborg, in western Sweden, on Sunday morning, staff at a Burger King restaurant were locked in while a thief, wielding a pistol, made away with the takings.
No shots were fired and no one was injured in the incident, according to police.