The United States received information from a European ally that the Ukrainian military planned to attack the Nord Stream gas pipelines.

(CNN) — The U.S. received information from a European ally last year that the Ukrainian military was planning an attack three months before the Nord Stream gas pipelines were attacked, three U.S. officials told CNN.

Last September’s attacks on gas pipelines have been condemned by US officials and Western allies as damaging critical infrastructure. It is currently being investigated by other European countries.

The intelligence services assessment was first revealed by The Washington Post, which obtained the document from a trove of classified documents allegedly leaked by Air National Guardsman Jack Teixeira on the social media site Discord.

CNN has not seen the document, but all three officials confirmed that the U.S. was briefed on the Ukrainian plans.

According to The Washington Post, it cited a source in Ukraine as saying that Western allies “have a basis to suspect that Kyiv has engaged in sabotage.” Intelligence services say the perpetrators reported directly to Ukraine’s commander-in-chief, Valery Zalushny, “and Ukraine’s President Volodymyr Zelensky was ordered not to witness the operation,” The Washington Post reported.

However, the intelligence agency also said Ukraine’s military action was “available.”

CNN has reached out to the Ukrainian government for comment.

John Kirby, the strategic communications coordinator for the White House National Security Council, declined to directly address the information on Tuesday.

“I think you know three countries are investigating the sabotage of Nord Stream – we’re calling it sabotage for now – Germany, Sweden and Denmark. Those investigations are ongoing and again the last thing we want to do from this stage is get ahead of those investigations,” Kirby said.

The news comes less than a year after leaks caused by underwater explosions were discovered in the Nord Stream 1 and 2 pipelines that carry gas from Russia to the European Union under the Baltic Sea. The pipelines were a point of contention before the start of the war in Ukraine, fueling concerns about Europe’s reliance on Russian gas.

None of the pipelines were carrying gas to Europe at the time of the leak, although they contained gas under pressure.

Sweden was the first to sound the alarm about the leak; Swedish Prime Minister Magdalena Andersen said it was “probably a deliberate act” but “not an attack on Sweden”.

Other European leaders, such as the Danish Prime Minister and Minister of Energy and the Norwegian Minister of Oil and Energy, also concluded that the leaks were caused by sabotage.

Ukraine later denied any responsibility for the leaks, with a top aide to Zelensky calling the idea a “funny conspiracy” theory.

“I enjoy collecting funny conspiracy theories about the government [ucraniano]I have to say: [Ucrania] There was no connection to the Baltic Sea accident and no information about ‘pro-sabotage groups'[ucranianos]Mykhailo Podoliak said on Twitter.

The Washington Post reported on Tuesday that Ukrainian officials tried to dissuade Zelensky from planning Nord Stream, giving him “a credible way to deny his involvement in an audacious attack on civilian infrastructure” that could hurt relations with countries supporting Ukraine’s fight against Russia. .

The Washington Post reported that details emerging from a German investigation into the attack were “consistent with an earlier plot,” although intelligence said the Ukraine plan was on hold.

Intelligence the U.S. received from a European ally last year showed six members of Ukrainian special operations forces using false identities to charter a vessel and plan to destroy or damage oil pipelines on the bottom of the Baltic Sea using “vehicle sinkers,” The Washington said. Mail.

According to The Washington Post, details gathered by German authorities showed six people who were “expert divers” boarded a sailboat in Germany using fake passports and then planted explosives in the pipes.

The details between the two programs differed in some respects, with the CIA “initially questioning the reliability of the information,” according to The Washington Post. However, earlier sources told CNN that the US had warned several European allies over the summer that the Nord Stream 1 and 2 pipelines could be attacked.