“There were maximum five perpetrators and they used some kind of a weapon in the robbery,” said Towe Hägg of the Stockholm police to the TT news agency.
The masked burglars looted the shop in Gamla Stan, a popular tourist area in the centre of the capital, before fleeing the scene.
Later in the afternoon, police arrested one man on the suspicion of robbery after he admitted himself to hospital for with injuries.
“We had been in contact with hospitals in the area and found out that a man had sought medical attention for his cuts,” said Hägg.
Police found a car in Södermalm soon after the incident, which they claim had been abandoned, and later confirmed that the vehicle has been reported as stolen.
The area surrounding the vehicle has been cordoned off and a forensic investigation is underway, with police spokesmen explaining that a connection between the car and robbery is suspected.
In Nacka, eastern Stockholm, a second car was found that police also linked to the robbery.
No one has been arrested as yet in connection with the robbery, and police have launched an investigation.
Another person received injuries in the incident from a broken window according to TT, although the severity of the injuries remains unknown.
It remains unclear how much loot the thieves managed to take.