New tax charges have been brought against President Trump's former campaign manager and business associate.

Details of an indictment by special counsel Robert Mueller allege Paul Manafort laundered more than $30m in income, with the help of Donald Trump's ex-deputy campaign manager Rick Gates.

The indictment accuses Manafort of disguising more than $10m in income from Cypriot entities as loans.

And it says the pair filed tax returns for 2010-2014 that they knew were not correct.

The court papers include 16 counts related to false individual tax returns.


Image: Rick Gates was Mr Manafort's deputy

Both Manafort and Gates have already pleaded not guilty to federal criminal charges filed against them by former FBI chief Mr Mueller in October.

The new indictment comes just a day after Alex Van Der Zwaan, a Dutch lawyer and son-in-law of a Russian oligarch, pleaded guilty to lying to investigators about communications regarding Ukraine with Gates.

Legal experts said the charge against Van Der Zwaan would place more pressure on Gates and Manafort to co-operate with Mr Mueller over the Russian interference investigation.

Image: Alex Van Der Zwaan admitted he lied to the FBI about his interactions with Rick Gates

In October last year, both Gates and Manafort were charged with 12 counts of conspiracy against the United States, making false statements, money laundering and failing to register as foreign agents for Ukraine.

The charges arose from consultant work for a pro-Russian government in Ukraine.

They both pleaded not guilty, with Mr Manafort released on $10m bond and Mr Gates released on $5m bond and placed under house arrest as they were deemed a flight risk.

On 15 February, Mr Gates finalised a plea deal with Mr Mueller's office, indicating he will co-operate in the election investigation.

A total of 19 people have now been charged as part of the investigation, including five US nationals, 13 Russians and one Dutchman.

Image: Mr Putin said claims against Paul Manafort were fabricated by Mr Trump's opponents

George Papadopoulos, who was on the Trump campaign's foreign policy advisory panel, admitted in October 2017 to making false statements to FBI agents about contacts he had with the Russian government in 2016.

As part of a plea bargain he has been co-operating with the investigation.

Michael Flynn, who was briefly Mr Trump's national security adviser at the start of his presidency, admitted to lying to the FBI about contacts he had with the Russian government during the presidential transition.

He has also been co-operating with the investigation.