Federal agents on Thursday raided the office of an attorney who in the past has handled the Trump Organization’s taxes.

The Chicago Sun-Times reports that “federal agents showed up unannounced at the City Hall office of Finance Committee Chairman Ed Burke, kicked everyone out and papered over the windows Thursday morning.”

Although it is unclear whether the raid was related to President Donald Trump, the raid on Burke’s office is sure to raise eyebrows given that it came on the same day that Trump “fixer” Michael Cohen pleaded guilty to lying to Congress about Trump Tower Moscow.

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Burke runs a law firm, Klafter & Burke, that specializes in property tax appeals.

According to the Sun-Times, Burke did tax-related work for the Trump Organization for the past twelve years before the two parties severed their business relationship earlier this year.

This past June, the Sun-Times reported that Burke “announced his breakup with Trump in letters filed last month with the Cook County courts and the Illinois State Property Tax Appeal Board” in which he wrote that ‘irreconcilable differences’ have led his firm to stop representing Trump’s company and step aside in five current cases that seek refunds of millions of dollars in property taxes the president’s company has paid.”

Law enforcement officials have so far declined to comment on the nature and purpose of the raid on Burke’s office.