An adviser to Donald Trump during his election campaign, George Papadopoulos, has admitted seeking to set up a meeting between the campaign and Russian officials, according to a BBC report.
pleaded guilty this month to having lied to the FBI over when he met go-betweens, an unsealed justice department statement reveals.
He said he had been told the Russians possessed “dirt” on Hillary Clinton.
Former Trump campaign manager Paul Manafort has been charged with tax fraud in an unrelated case.
The 12 charges brought against Mr Manafort and one of his business associates, Rick Gates, include conspiracy to launder money.
They do not relate to Mr Trump’s campaign but to the pair’s Ukrainian business dealings up to 2015.
An investigation headed by special counsel Robert Mueller is looking into any links between Russia and the Trump campaign. Both sides deny any collusion.