The robbery was carried out as a guard returned to her vehicle in Täby, in northern Stockholm. The robbers made away in car, and were later seen by a witness changing into a green Volkswagen Passat in Roslags Näsby. They then drove towards central Solna, also in the north of Stockholm.
Police caught up with the car, whereupon the robbers fired shots at the police car. It is not known how many shots were fired. The getaway car was abandoned on Östervägen in Solna, which has now been sealed off by police.
Police officers and the security guard were not harmed during the robbery.
An investigation has been started into the incident, according to police spokeswoman Ann-Charlotte Wejnäs. Both getaway cars have been impounded by police, and witnesses in the area are being interviewed.