MAPLE GROVE, Minn. (WCCO) — Six people are looking for a new place to live after a late-night house fire in Maple Grove Tuesday.

The fire started at about 11 p.m. One of the people living in the four-plex on Yorktown Lane told the fire chief he had just turned on his sauna before the fire broke out.

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Flames spread through the home and into the attic.

Authorities said the building’s gas meters also caught fire.

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Two units have heavy damage and the other two sustained mostly smoke damage.

Damage is estimated at about $200,000.

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It was not immediately clear what may have started the fire.