The fire at Källö-Knippla was under control on Wednesday afternoon and no one was injured.
But on the Tuesday evening when it started, it was dramatic, says Mikael Westman, a resident of Källö-Knippla.
One person remained in the grocery store and was unable to get out.
Hear Mikael Westman tell about the rescue operation in the clip above.
The police confirm to SVT Nyheter Väst that a man who was in the building when the fire broke out and that he was helped to get out.
The man escaped uninjured.