Shurtleff says BP had its own insurance policies for cleanups and wasn't entitled to nearly $1.5 million from Utah's Petroleum Storage Tank Fund.
The state's top lawman says BP helped itself to state assistance for a dozen years until 2007.
The fund was set up only for petroleum storage tanks owners without insurance for cleanups.
Utah filed a similar lawsuit in June against ConocoPhillips. Montana is pursuing a claim that BP collected money from a tank cleanup fund while also collecting insurance payouts. BP says the state actions are without merit and do not amount to fraud.
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