The IRS is now sharing information on Trump campaign associates with Robert Mueller's special counsel office, including former campaign manager Paul Manafort and former national security adviser Michael Flynn.

CNN reported on Tuesday that the agency is providing documents to Mueller's prosecutors as the team goes back through 11 years of files to investigate possible financial crimes.

The documents provided include tax return-related documents, such as real estate and banking records. Previous tax-related documents were seized by FBI agents when they raided Manafort's home in July.

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The information the IRS can share is restricted under Title 26 US Code and usually needs a grand jury subpoena to share tax returns with another agency.

It wasn't clear, according to the report, whether the information provided by the IRS included President Trump's tax returns.

Flynn and Manafort are both under investigation for financial crimes. Mueller's team is probing whether Flynn, who has lobbied in the past for Turkey, was paid secretly by the Turkish government during the final months of the 2016 presidential campaign.