COPENHAGEN, Denmark >> Russian President Vladimir Putin on Friday accused the West of sabotaging Russia-built natural gas pipelines under the Baltic Sea to Germany, a charge vehemently denied by the United States and its allies.

Nordic nations said the undersea blasts that damaged the pipelines this week and have led to huge methane leaks involved several hundred pounds of explosives.

The U.S.-Russia clashes continued later at an emergency meeting of the U.N. Security Council in New York called by Russia on the attacks on the Nord Stream 1 and 2 pipelines, and as Norwegian researchers published a map projecting that a huge plume of methane from the damaged pipelines will travel over large swaths of the Nordic region.

Speaking Friday in Moscow at a ceremony to annex four regions of Ukraine into Russia, Putin claimed that “Anglo-Saxons” in the West have turned from imposing sanctions on Russia to “terror attacks,” sabotaging the Nord Stream 1 and 2 pipelines in what he described as an attempt to “destroy the European energy infrastructure.”

He added that “those who profit from it have done it,” without naming a specific country. In Washington, U.S. President Joe Biden dismissed Putin’s pipeline claims as outlandish.

“It was a deliberate act of sabotage. And now the Russians are pumping out disinformation and lies. We will work with our allies to get to the bottom (of) precisely what happened,” Biden promised, adding that divers would be sent down to inspect the pipelines. “Just don’t listen to what Putin’s saying. What he’s saying we know is not true.” U.S. officials said the Putin claim was trying to shift attention from his annexation Friday of parts of Ukraine.

“We’re not going to let Russia’s disinformation distract us or the world from its transparently fraudulent attempt to annex sovereign Ukrainian territory,” White House National Security Council spokeswoman Adrienne Watson said.

At the United Nations, Sergey Kupriyanov, spokesman for the Russian state-owned company Gazprom, which is the majority stakeholder in Nord Stream, told the council that data regarding the sudden drop in pressure in the pipeline and the gas leakage “make it possible to say with certainty that the leaks in the pipelines was caused by physical damage.”

Kupriyanov said in a video briefing that Gazprom has begun searching for possible solutions to make the Nord Stream system operational again. There is no estimate of how long it will take, he said, “but we can say with certainty that the task will be very daunting from a technical standpoint.”