BP sues US over contract ban after 2010 Gulf spill

British energy giant BP is suing the US government for banning it from federal contracts after the deadly 2010 Deepwater Horizon disaster in the Gulf of Mexico, documents showed Tuesday.

The US Environmental Protection Agency last year barred BP from competing for new federal contracts following the catastrophic accident three years ago, which left 11 people dead and sent millions of barrels of oil churning into the Gulf.

The EPA decision, citing BP's "lack of business integrity," came after BP agreed to pay a record $4.5 billion last November to settle criminal charges arising from the case.

The lawsuit filed this week by BP in federal court in Texas has challenged the EPA ban, arguing it surpassed the agency's authority and constituted an abuse of power.

"EPA's decision to suspend did not address the overwhelming evidence and record of BP's present responsibility as a government contractor and leaseholder," the suit said.

It "did not attempt to explain how or why immediate suspension was necessary to protect the public interest, as federal law requires."

BP argued that the company has already been punished for the oil spill and faces "irreparable harm" if the bans are not lifted.

The British energy giant has paid several billion dollars in various settlements since the disaster.

It labelled the EPA's action "punitive, arbitrary, capricious, and an abuse of EPA's discretion."

Around 4.9 million barrels of oil gushed into the Gulf over a three-month period following the April 2010 explosion aboard the offshore rig, devastating the region's environment and economy.

BP has resolved thousands of lawsuits linked to the disaster out of court, including the record $4.5 billion deal with the US government to settle criminal charges, and a $7.8 billion settlement with people and businesses affected by the spill.

BP spent more than $14 billion on the response and cleanup and paid another $10 billion to businesses, individuals and local governments that did not join the class action lawsuit.

It remains on the hook for billions in additional damages, including the cost of environmental rehabilitation.

A civil trial which got under way in Louisiana earlier this year could result in BP having to pay billions of dollars in environmental fines if the Justice Department proves that gross negligence led to the accident.