US President Donald Trump's former campaign manager Paul Manafort has surrendered before federal authorities over a case about possible Russian meddling.
Manafort arrived at the Federal Bureau of Investigation (FBI) Washington field office on Monday.
He was to surrender to federal authorities, reports Reuters quoting the New York Times and CNN.
Paul Manafort surrendered on Monday in the first charges stemming from a special counsel investigation of possible Russian meddling in the 2016 US presidential election, according to media reports.
The charges against Manafort would be the first arising from the investigation by Justice Department special counsel Robert Mueller.
Robert Mueller was appointed to look into alleged Russian meddling to sway the election in favour of Trump.
The charges against Manafort would include tax fraud, according to the Wall Street Journal.
A federal grand jury issued the indictment on Friday and a federal judge ordered it sealed, a source briefed on the matter told Reuters, adding it could be unsealed as soon as Monday.
Manafort associate Rick Gates would also surrender.
Lawyers for Gates and Manafort would not immediately return calls for comment.
Manafort, 68, served the Trump campaign from June to August of 2016 before resigning amid reports he may have received millions in illegal payments from a pro-Russian political party in Ukraine.