US Attorney General William Barr has delivered the main findings of the Mueller report to Congress.
Lawyers received the four-page letter this afternoon, just days after the conclusion of the investigation into alleged Russian meddling in the US 2016 presidential election.
US President Donald Trump has always denied collusion with his campaign, calling the inquiry a 'witch-hunt'.
The US Justice Department says it has found no evidence of collusion - but it also does not exonerate the president.
