Feds Say West, Texas Fire Was Intentionally Set

Dallas Morning News:

Someone deliberately started the fire that triggered the fatal explosion in West three years ago, government investigators announced Wednesday.
They did not identify any suspects at the West Fertilizer Co. Their conclusion was partly based on a re-enactment of the fire performed at a research lab in Maryland, according to officials from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives and the Texas fire marshal’s office. An ATF official said investigators had also conducted more than 400 interviews and analyzed evidence at the site, photos and videos....
Elder offered few details, saying he didn’t want to jeopardize the integrity of the continuing investigation. He said investigators eliminated natural and accidental causes and proved the fire started in a portion of the fertilizer plant used to store seed.
Elder said he didn’t know why the fire was set.
“We don’t know what they were thinking, because we haven’t talked to them,” he said.
Elder said that the owner of the plant has cooperated with the investigation.

I doubted from the start that the fire was intentionally set.  I guess maybe I was wrong.  It still doesn't make any sense, though.  Why would somebody torch a fertilizer plant?