Once in the scene, the rescue service found that someone had lit a fire on some cartons.
- We were able to extinguish fairly immediately but the fire had risen to the eaves and the entire business premises was smoky, says Johan Gustavsson, internal commander Räddsam Mälardalen.
The event is classified as an arson fire.
"Forensic technicians will conduct a crime scene investigation, hopefully during the day," says Thomas Agnevik, the police spokesman.
There is currently no suspect or arrest for the incident.