NEW YORK ( TheStreet) -- BP Plc ( BP) is leveling some serious charges against Halliburton ( HAL) as the courts continue to sort through the evidence to determine who deserves what amount of blame for the Gulf of Mexico spill off the coast of Louisiana in April 2010.

According to a report from Bloomberg, BP accused a unit of Halliburton of destroying pertinent test results in a court filing.

BP said the test results showed samples of the concrete used by Halliburton to seal the Macondo well were unstable, and asked the court to "find that Halliburton destroyed evidence on purpose and to compel the company to turn over for third-party examination the computer used for the modeling," Bloomberg said.

A Halliburton spokesperson told Bloomberg the company is reviewing the motion filed by BP. The two companies are involved in litigation about who caused the spill.

BP shares closed Monday at $43.57, up 28 cents; while Halliburton's stock rose 1.2% to $37.01.

-- Written by Michael Baron in New York.

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