FILE PHOTO: Gas bubbles from the Nord Stream 2 leak reaching surface of the Baltic Sea in the area shows disturbance of well over one kilometre diameter near Bornholm, Denmark, September 27, 2022.
A spokesperson for Ukraine's military told Reuters on Sunday he had "no information" about the report.
Russia has repeatedly said, without providing evidence, that the West was behind the Nord Stream blasts - particularly the United States and Britain, which both deny involvement.
The New York Times and The Washington Post have reported that Ukraine - which has repeatedly denied involvement, was behind the attack.
In a blog post, entitled "How America Took Out The Nord Stream Pipeline", Hersh said the plan was hatched in 2021 at the highest levels in the United States.
Persons:
Volodymyr Zelenskiy, Chervinsky, Valery Zaluzhnyi, Dmitry Peskov, Zelenskiy, Peskov, Vladimir Putin, Seymour Hersh, Hersh, Dmitry Antonov, Vladimir Soldatkin, Guy Faulconbridge, Andrew Osborn
Organizations:
Danish Defence Command, REUTERS, Rights, Washington Post, Reuters, Sunday, U.S, New York Times, Thomson
Locations:
Baltic, Bornholm, Denmark, Ukrainian, Russia's, Europe, Ukraine, Germany, Russia, United States, Britain, Washington