On Thursday, Special Counsel Robert Mueller filed new charges in his investigation against former Trump campaign chairman Paul Manafort and former associate Rick Gates for failing to report income to tax authorities.

The new superseding indictment alleges that Manafort laundered more than $30 million in income with Gates' assistance. The Hill reports:

A federal court in Virginia returned a 32-count superseding indictment charging Manafort and Gates with committing tax fraud, failing to file reports on foreign bank and financial accounts and bank fraud conspiracy.

The original 12-count indictment against Manafort and Gates unsealed in October detailed extensive allegations of financial crimes, including bank fraud and money laundering, linked to their work for pro-Russian political parties in Ukraine.

Earlier this week it was revealed that Gates agreed to plead guilty to fraud-related charges and planned to testify against Manafort for a reduced sentence.

While there were no exact terms for his cooperation with the special counsel, a person familiar with the investigation, who was not allowed to speak on the record because of a gag order in the case, told the Los Angeles Times that Gates is likely to serve an 18-month prison sentence.

This is a developing story, check back for updates.