Some kind of cleaning work has been going on in a fuel tank at the gas station, says the police's press spokesperson Magnus Jansson Klarin.
One person is seriously injured and has been taken to hospital by ambulance helicopter, the police write on their website.
The police were alerted at 13:59 on Monday. There is no fire at the gas station, but it is assessed that there is still a risk of explosions.
They are cordoning off and are also emptying a parking lot at a nearby grocery store. There are a lot of rescue personnel on site, says Magnus Jansson Klarin.
The cordons are a hundred meters from the actual site, some roads are completely closed off.
It is still unclear why the explosion occurred.
At present, there is no criminal classification.
