Dutch lawyer Alex Van Der Zwaan has pleaded guilty to charges that he made false statements about his contact with ex-Trump campaign aide Rick Gates to federal prosecutors working with special counsel Robert Mueller.

The allegations are the latest charges in Mr Mueller’s investigation into alleged Russian interference in the 2016 election. Mr Van Der Zwann's plea was delivered Tuesday afternoon.

The court filing says that Mr Van Der Zwaan lied to federal investigators about his interactions with Mr Gates, who was indicted last year on charges relating to his consulting work with political figures in Ukraine.

Mr Gates has pleaded not guilty. However, he has been in the process of switching lawyers, the Wall Street Journal reported, indicating he may be talking to prosecutors about a potential plea deal himself.

The charging documents say Mr Van der Zwaan made false statements about the last time he communicated with Mr Gates and another unnamed person, simply identified as “Person A”.

He allegedly told the FBI and the special counsel’s office that his last communication with Mr Gates had been in August 2016, when he had actually spoken to Mr. Gates in September 2016 about the Ukraine work, the document said.

Additionally, Mr Van Der Zwaan is accused of lying in an interview with Mr Mueller's office in November 2017 about his 2012 work for the Ukrainian government, according to the criminal-information document.

Special Counsel Robert Mueller is leading the federal probe into Russian meddling in the 2016 election (Getty)

The biggest names involved in the Trump-Russia investigation Show all 17 1 /17 The biggest names involved in the Trump-Russia investigation The biggest names involved in the Trump-Russia investigation Paul Manafort Mr Manafort is a Republican strategist and former Trump campaign manager. He resigned from that post over questions about his extensive lobbying overseas, including in Ukraine where he represented pro-Russian interests. Mr Manafort turned himself in at FBI headquarters to special counsel Robert Mueller’s team on Oct 30, 2017, after he was indicted under seal on charges that include conspiracy against the United States, conspiracy to launder money, unregistered agent of a foreign principal, false and misleading US Foreign Agents Registration Act statements, false statements, and seven counts of failure to file reports of foreign bank and financial accounts. Getty The biggest names involved in the Trump-Russia investigation Rick Gates Mr Gates joined the Trump team in spring 2016, and served as a top aide until he left to work at the Republican National Committee after the departure of former Trump campaign manager Paul Manafort. Mr Gates' had previously worked on several presidential campaigns, on international political campaigns in Europe and Africa, and had 15 years of political or financial experience with multinational firms, according to his bio. Mr Gates was indicted alongside Mr Manafort by special counsel Robert Mueller's team on charges that include conspiracy against the United States, conspiracy to launder money, unregistered agent of a foreign principal, false and misleading US Foreign Agents Registration Act statements, false statements, and seven counts of failure to file reports of foreign bank and financial accounts. AP The biggest names involved in the Trump-Russia investigation George Papadopoulos George Papadopoulos was a former foreign policy adviser for the Trump campaign, having joined around March 2016. Mr Papadopoulos plead guilty to federal charges for lying to the FBI as a part of a cooperation agreement with Special Counsel Robert Mueller's investigation. Mr Papadopoulos claimed in an interview with the FBI that he had made contacts with Russian sources before joining the Trump campaign, but he actually began working with them after joining the team. Mr Papadopoulos allegedly took a meeting with a professor in London who reportedly told him that Russians had "dirt" on Hillary Clinton. The professor also allegedly introduced Mr Papadopoulos to a Russian who was said to have close ties to officials at the Russian Ministry of Foreign Affairs. 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Mr Van der Zwaan also allegedly told investigators he did not know why an email between him and Person A was not given to the Special Counsel’s office, but had actually deleted or failed to produce emails that were being sought.

The charges on Monday follow Mr Mueller’s indictment last week against 13 Russian nationals and a Kremlin-linked internet firm on charges that they meddled in the 2016 US presidential election.

Mr Mueller is investigating Russian election interference and links between the Trump campaign and Russia.

American nationals, including Mr Trump’s former national security adviser Michael Flynn and former campaign chairman Paul Manafort, have also been charged in Mr Mueller’s investigation. Mr Flynn pleaded guilty for lying to the FBI about his conversations with the Russian ambassador. Meanwhile, Mr Manafort has pleaded not guilty to all charges against him in the Russia probe.

President Donald Trump has repeatedly denied there was any collusion between his campaign and Russia. The Kremlin has denied it interfered in the US's election.