According to the Tageblatt's research, Luxembourg is mentioned in Special Counsel Robert Mueller's mammoth report on Russian interference in the 2016 US elections.

The Luxembourg connection in the Mueller report relates to the Russian oligarch Petr Aven's attempts to make contact with President Donald Trump's team. Aven, who is close to the Russian President Vladimir Putin, first's step in this attempt occurred at the end of December 2016 in Luxembourg.

The headquarters of the company LetterOne is based on Place de l'Etoile right next to the Russian Orthodox church. Aven, also the director of Alfa, one of the largest Russian private commercial banks, is on the executive board of LetterOne. Allegedly, Putin told Aven during a meeting to ensure that his bank no longer be affected by US sanctions, which Aven understood as taking up contact with Trump's team.

As a result, towards the end of December 2016, Aven met with another member of the executive board of LetterOne - US businessman and former diplomat Richard Burt. In the private meeting, Aven explained that there is an interest in establishing communications between the Kremlin and Trump's team, as reported by the Mueller investigation. The two businessmen's efforts did not turn into much else.

Mueller investigated the possibility of Russian collusion in Donald Trump's election team. The full report was published on 18 April 2019.