MINNEAPOLIS (WCCO) – Firefighters in the west metro worked all night to keep a wetland fire from damaging any homes or businesses.

Around 8:30 p.m. Sunday, a fire occurred in a large wetland area between Highway 12 and Independence City Hall.

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Police said the fire started in the middle of the swamp, which is completely covered in Cattails and water. It was measured at approximately 100 feet by 100 feet when crews arrived.

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The fire burned over 50 acres of the 160 acre swamp, but firefighters were able to keep the flames from damaging any buildings.

Highway 12 was closed for four hours between County Road 83 and County Road 90.

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The cause is currently under investigation.