Four stations are located by the fire in Skoby outside Alunda.
- We are working on site now, and we have a forecast to stay for just over two more hours, said Alexander Axelsson, management operator at Stockholm's fire service, earlier on Friday night.
The fire could be limited and no longer poses a risk of spreading to nearby buildings.
The police write on their website that a person is feared to have died in connection with the fire, relatives have been notified.
A preliminary investigation has been initiated into the murder fire so that the police can thoroughly investigate how the fire started.
The site is cordoned off and a technical investigation will be carried out, the police announce.