The US special investigator Robert Mueller has apparently found in his investigations no evidence of a conspiracy of President Donald Trump with Russia in the 2016 election campaign. This is to emerge from a summary that was presented on Sunday by the US Department of Justice to the congress.

US Secretary of Justice William Barr has received a "very brief letter" about the special investigator's report, tweeted Democratic Chairman of the House Judiciary Committee, Jerry Nadler. He announced to publish the letter shortly.

Mueller had handed over his report on Friday to the politician Barr - and completed his investigations into the Russia affair of Trump's campaign team after nearly two years.

He had determined from May 2017 whether there had been collusion between the Trump camp and representatives of Russia in alleged attempts by Russia to influence the US presidential campaign in 2016 - and whether the president would obstruct the judiciary with the dismissal of FBI chief James Comey have. The investigation had led to more than 30 charges, including six people from Trump's environment.