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A Colonial Pipeline station in Smyrna, Ga., on May 11.

Mike Stewart/The Associated Press

The Department of Homeland Security on Tuesday announced new requirements for U.S. pipeline operators to bolster cybersecurity following a May ransomware attack that disrupted gas delivery across the East Coast.

In a statement, DHS said it would require operators of federally designated critical pipelines to implement “specific mitigation measures” to prevent ransomware attacks and other cyber intrusions. Operators must also implement contingency plans and conduct what the department calls a “cybersecurity architecture design review.”

It’s the latest response by the Biden administration to a series of ransomware attacks and intrusions hitting critical U.S. infrastructure and raising fears about American cybersecurity.

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DHS did not immediately release further details about the guidance, which comes after another directive issued weeks after the May 7 attack on Georgia-based Colonial Pipeline. That attack led to the shutdown of a system delivering about 45 per cent of the gasoline consumed along the East Coast and sparked long lines and gas shortages in several states.

Colonial paid an estimated $4.4-million ransom, most of which was eventually recovered by the Justice Department. The FBI has blamed the attack on a Russia-based gang of hackers using the DarkSide ransomware variant.

The Biden administration has repeatedly accused Russia of granting safe haven to criminal gangs and trying to steal from government agencies and private organizations in various sectors. It imposed sanctions in April for a range of activities including hacking.

Russia has broadly denied being involved in cyberattacks of U.S. institutions, decrying “unfounded accusations” in a statement last month.

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