The German government has refused to clarify whether it received warnings ahead of the Nord Stream sabotage, Ostdeutsche Allgemeine Zeitung (OAZ) reported on Friday, citing a written response to an opposition lawmaker.

Anna Rathert, an MP from the Alternative for Germany (AfD) party, asked the chancellor’s office whether it had received any information from foreign intelligence agencies before the twin pipelines, built to deliver Russian gas to Germany via the Baltic Sea, were bombed in September 2022. She also asked why the government had not taken any precautions.

In the document, obtained by the outlet, the government said the issue “touches on the national interest to a particularly high degree” and could jeopardize “the trusting cooperation” between Germany and its allies. The document added that the response should be treated as “neither confirming nor denying” the matter at hand.

According to OAZ, the chancellery refused to provide the information through a special parliamentary procedure that allows classified data to be shared with MPs under strict security protocols. Rathert told the outlet she viewed the response as a sign that Berlin was concealing information.

In 2023, the Wall Street Journal reported that the CIA had warned European intelligence agencies, including Germany’s Federal Intelligence Service (BND), about a potential attack on Nord Stream by a pro-Ukrainian group. Der Spiegel and Cicero magazine later reported that the BND had received reports from the CIA and the Dutch intelligence agency AIVD, but the chancellery dismissed them as “tall tales.”

A lawyer for Sergey Kuznetsov, a former Ukrainian commando charged with sabotage, told RT this week that the German authorities were treating the attack on the pipelines as a war crime. “There are sufficient grounds for suspicion that the acts of sabotage were committed on the instructions of Ukrainian state bodies and were directed by them,” the indictment states, according to Nicola Canestrini, an Italian defense counsel.

Germany has alleged that the sabotage was carried out by a Ukrainian team using a small rented yacht. Russia has argued, however, that such a sophisticated operation could not have been carried out without Western assistance. Russian President Vladimir Putin has suggested that the US may have been involved.