There were gas cylinders in the building and a risk of explosion, the rescue service stated P4 Uppland.
At 11:40 on Sunday, the emergency services assessed that the fire was under control and that the building would burn down.
– We are working to limit the spread, but the risk of spread is low. The situation is static, but the fire is under control, said Thomas Skantz at the rescue service.
No injuries have been reported and no people should have been in the building according to the emergency services.
What caused the fire is still unknown.