US Special Counsel Robert Mueller’s probe into Russia’s alleged interference in the US presidential election has produced no materials (available from open sources) thus far that might be worthy of attention, Russian presidential spokesman Dmitry Peskov said on Thursday.

"In open sources we have not seen any materials that might deserve attention or be called serious," Peskov told the media, adding he knew nothing about some Mueller probe-related documents reportedly uploaded in Internet from Russian IP addresses.

"There has been too much fuss over the Mueller investigation," he remarked.

"Miller (the CEO of Russia’s gas giant Gazprom) is far more efficient than Mueller. I can state this with certainty," Peskov said with a smile.

Mueller’s investigation into alleged attempts by Russia to intervene in the US presidential election is about to be completed, US Acting Attorney General Matthew Whitaker said on Monday.

Since May 2017 Special Counsel Robert Mueller has been probing into claims the Russian authorities tried to influence the 2016 US presidential election. President Donald Trump and his aides have repeatedly dismissed all suspicion of unlawful contacts with Russian officials during the election campaign. Moscow, too, has many times denied attempts to influence the US election.