It also included an allegation that a fixer described by the Federal Bureau of Investigation as a former Russian spy, Konstantin Kilimnik, helped Manafort obstruct justice.
It also adds a charge for conspiracy to obstruct justice, meaning Manafort and Kilimnik allegedly did it together.
The two witnesses reportedly told the Federal Bureau of Investigation they believed Manafort and Kilimnik had been trying to get them to lie about their work.
This is how Vogel puts it in the third paragraph of his story: "The special counsel, Robert S. Mueller III, has not publicly sought to connect Mr. Kilimnik or Mr. Manafort to Russian meddling in the 2016 election, but Friday's indictment of Mr. Kilimnik could carry symbolic significance nonetheless".
They could also be an effort by Mueller to induce a guilty plea and secure the testimony of a critical campaign adviser to Trump.
Kilimnik, according to court papers, wrote a message to the other executive two days later saying: "Basically P wants to give him a quick summary that he says to everybody (which is true) that our friends never lobbied in the U.S., and the objective of the program was European Union".
Manafort's lawyers filed a response Friday that "the Special Counsel contrives dubious allegations".
The charges, placed by special counsel Robert Mueller, who is investigating possible collusion between Donald Trump and Russian Federation in the run-up to the 2016 election, increase Manafort's legal jeopardy if he continues an aggressive battle with prosecutors. The group's lobbying work included advocacy on behalf of Yanukovych in Washington, D.C., with members of Congress and officials in the executive branch.
According to the Prosecutor, between 2006 and 2014 Manafort and his partners Richard gates and kilimnik "participated in a lobbying campaign worth millions of dollars in the United States", working with the ex-President of Ukraine Viktor Yanukovych, Party of regions and the government of Ukraine.
The FBI has assessed that Kilimnik had ongoing ties to Russian intelligence, including during the 2016 presidential campaign when Manafort and Gates were in contact with him, prosecutors have said in court filings.
Investigators claimed that the "repeated" contacts occurred while Manafort was under house arrest, as a condition of his release pending the trials in Washington and Virginia.
A spokesperson for Manafort released the following statement in light of the new charges: "Mr. Manafort is innocent and nothing about this latest allegation changes our defense".
Manafort worked with a lobbying firm that enlisted former European politicians, the so-called Hapsburg group, who wrote articles and addressed USA politicians.
Prosecutors say that the "P" in the message refers to Manafort and that the assertions in the texts are untrue.
Manafort, who was chairman of Trump's campaign for several months in 2016, has been charged with multiple counts of tax evasion, money laundering and bank fraud.
Manafort has been the subject of a long-running investigation over his dealings in Ukraine several years ago - for which he didn't file as a foreign agent until June 2017.
They argue the limited amount of communications "cannot be fairly read, either factually or legally, to reflect an intent to corruptly influence a trial witness".
The Atlantic magazine reported this week that Kilimnik has acted as an intermediary between Manafort and Oleg Deripaska, a Russian oligarch with close contacts to Russian President Vladimir Putin. His co-defendant, Rick Gates, pleaded guilty in February and agreed to co-operate with prosecutors.
On Friday, Trump wouldn't rule out pardoning Manafort.
The men continued to work together for a successor party to Yanukovych's after he fled Ukraine in February 2014 amid protests of his regime's corruption and pivot toward Moscow, eventually arriving in Russian Federation and effectively ending his presidency.