Intelligence Suggests Pro-Ukrainian Group Sabotaged Pipelines, U.S. Officials Say

New intelligence reviewed by U.S. officials suggests that a pro-Ukrainian group carried out the attack on the Nord Stream pipelines last year, a step toward determining responsibility for an act of sabotage that has confounded investigators on both sides of the Atlantic for months.

U.S. officials said that they had no evidence President Volodymyr Zelensky of Ukraine or his top lieutenants were involved in the operation, or that the perpetrators were acting at the direction of any Ukrainian government officials.

The brazen attack on the natural gas pipelines, which link Russia to Western Europe, fueled public speculation about who was to blame, from Moscow to Kyiv and London to Washington, and it has remained one of the most consequential unsolved mysteries of Russia’s year-old war in Ukraine.

Ukraine and its allies have been seen by some officials as having the most logical potential motive to attack the pipelines. They have opposed the project for years, calling it a national security threat because it would allow Russia to sell gas more easily to Europe. Ukrainian government and military intelligence officials say they had no role in the attack and do not know who carried it out.