SOS was alerted if a heavy smoke pillar and rescue service could quickly gain control of the fire.

- It was burning on the roof. They are being rebuilt there so it is partly a construction site, says Mats Streer, internal commander at the rescue service Syd.

How extensive are the injuries?

- As I understand it is only the roof that has suffered damage and possible water damage and smoke damage, but the house remains.

The rescue service is expected to remain on site until dawn.

- What we are doing now is to make sure we have this under control, says Mats Streer.

Police have blocked and will conduct a forensic investigation.