Shortly after 2:00 pm, on Thursday night, police and rescue services were warned at a grocery store in Vänersborg.
"The follower then sees smoking in the store," says Krister Fuchsborg, a Western-Western police press officer.
The fire can be extinguished relatively quickly, but police suspect it is built.
– We mean this as an arson. Someone has broken a box, stolen and burned the goods in the store, says Foxborg.
It is still unclear what the subject is.
"We do not know if the perpetrator has stolen anything, but today we hear the stakeholders," Foxborg said.
The police will conduct a technical investigation on the spot during the day.