CITY OF BROOKFIELD - Initial investigations into a large fire at a Brookfield office park has found that it was an accident.

The Wisconsin Division of Criminal Investigations and the Bureau of Alcohol, Tobacco, Firearms and Explosives took a joint look into the fire that erupted at Building C in the Eastbrook Executive Office Park complex, 12690 W. North Ave., sometime before 3 a.m. Sunday, July 30.

"They got to a point where they didn't believe that it was an intentional fire," Brookfield Fire Chief Charlie Myers said. "So it would be ruled as unintentional. They turned it over to the insurance companies to see whether or not they wanted to investigate further."

The investigation determined that the fire likely started in the southeast corner of the first floor of the building.

"From our perspective, at this point in time, there isn't an identifiable cause of the fire," Myers said.

City of Brookfield firefighters were first called to the scene at approximately 2:48 a.m. after a passerby called to report seeing flames. A city of Brookfield police officer arrived within a minute and reported that the building was fully engulfed.

Myers said the department has reported Building C as a total loss and that the assessed value of the structure was approximately $1.25 million.

The size of the fire and its proximity to other structures to which it possibly could have spread resulted in the incident's alarm level being upgraded twice. Brookfield firefighters were assisted by 13 other departments at the scene including the town of Brookfield, Pewaukee, Elm Grove, New Berlin, Wauwatosa, Lisbon, Tess Corners, West Allis, Sussex, Greenfield, city of Waukesha, Menomonee Falls and Vernon.

In addition, the Lake Country, Franklin, city of Milwaukee, North Shore and Butler fire departments all helped to backfill Brookfield fire stations while the blaze was being battled.

One firefighter suffered a minor injury at the scene.

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