A fire occurred at Rose Acre Farms' facility on July 17, but damage was limited thanks to a sprinkler system that was installed after another fire in 2012. The cause of Wednesday's fire, which forced the closure of a soybean processing plant at Rose Acre Farms west of Seymour, Ind., remains under investigation.

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Officials with the company that manufactures the dust-collecting equipment for the plant were at the site trying to determine the cause, Rose Acre Farms chief executive officer, Tony Wesner told news outlets. One possibility, Wesner said, is static electricity.