Special counsel Robert Mueller's team has partnered with New York Attorney General Eric Schneiderman as it investigates financial crimes President Trump's former campaign chairman Paul Manafort may have committed, according to a report Wednesday evening.

Schneiderman's office could carry out any legal proceedings against Manafort if Mueller's attorneys found illegal activity had taken place, sources told Politico.

The cooperation between both teams indicates the federal probe into possible collusion between Trump's associates and Russia is intensifying.

Mueller's attorneys have spent months examining Manafort's lobbying work and real estate deals in New York.

Both groups have collected evidence on Manafort's possible financial crimes, including money laundering.

Earlier this week, Mueller issued subpoenas for Manafort's previous lawyer and current spokesperson. The federal investigators requested documents and testimony from Akin Gump attorney Melissa Laurenza, who represented Manafort until recently, and his spokesman Jason Maloni.

The subpoenaing of a lawyer is not standard because it interferes with attorney-client privilege issues. However, Mueller's team has issued dozens of subpoenas as the probe has escalated over the last few months.

Manafort is being investigated for potential tax and financial crimes related to his work for the previous ruling party in Ukraine but has not been formally accused of committing any crimes. He is being represented by Kevin Downing, a former Department of Justice prosecutor whose expertise is in tax issues.

The FBI raided Manafort's Alexandria, Va., home last month after obtaining a search warrant for documents, including tax records. Manafort was not warned about the bust, which took place before sunrise on July 26.

The raid came one day after Manafort voluntarily sat down with the Senate Intelligence Committee.

Manafort had previously provided documents to the Senate Judiciary Committee, as well as the House and Senate Intelligence Committees, including notes he took about a June 2016 meeting in Trump Tower with Donald Trump Jr., Jared Kushner and a group of Russian citizens.