This is not the first time they have been called out to the store at Geneta center, says Anders Sessler, duty officer at the Södertörn rescue service.
This store was also attacked on Friday night, when someone poured flammable liquid and set it on fire.
The alarm about the explosion came at 10:47am and around half an hour later the rescue services were able to complete their operation.
The police say a preliminary investigation into serious public danger has been opened.
