We have a lot of resources on site, including many ambulances, Sören Gustavsson at SOS Alarm's press service said earlier.
The fire is believed to have started on a balcony and then spread to the roof.
The fire alarm sounded at 2:30 p.m. The house was burning with open flames and black smoke was pouring out.
At 5 p.m., police said on their website that no one was found in the house. However, a cat received help from an animal ambulance.
Police have charged a person with gross negligence causing public danger. Police have suspicions about how the fire started but declined to comment, citing an ongoing investigation.
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