American journalist, Pulitzer Prize winner Seymour Hersh published his investigation on February 8, in which, citing a source, he stated that explosive devices under Russian gas pipelines were planted in June 2022 under the cover of Baltops exercises by US Navy divers with the support of Norwegian specialists. According to Hersh, the decision to launch the operation was made by US President Joe Biden
after nine months of discussions with administration officials involved in national security issues. Later, the Pentagon told RIA Novosti that the United States
had nothing to do with undermining Russian gas pipelines.