Special Counsel Robert Mueller has submitted his long-awaited report on alleged collusion between Russia and President Donald Trump's 2016 campaign.
The Attorney General William Barr will now summarise the report and decide how much to share with Congress.
A justice department official said Mr Mueller's report did not recommend any further indictments.
The special counsel has already charged six former Trump aides and dozens of Russians.
Mr Barr told congressional leaders in a letter that he anticipated being able to inform them of the report's key findings over the weekend.
The report is intended to explain any prosecutorial decisions the special counsel has made in the 22 months since his appointment by deputy US Attorney General Rod Rosenstein.
Mr Trump and other Republicans have repeatedly condemned the probe as a "witch hunt".