Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s team has proof that President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s personal lawyer made a secret trip to Prague during the 2016 campaign despite his denial that he'd ever been there, McClatchy reported Friday.

It is not clear why Michael Cohen was in Prague. The claim he visited was originally made in a dossier compiled by former British spy Christopher Steele.

Cohen denied that he'd ever been to Prague "in my life" after the dossier's publication, tweeting a photo of his passport.

I have never been to Prague in my life. #fakenews pic.twitter.com/CMil9Rha3D — Michael Cohen (@MichaelCohen212) January 11, 2017

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McClatchy reported that Cohen entered the country through Germany in August or early September 2016, which does not require a passport stamp.

The dossier claimed that, in Prague, Cohen met with a prominent ally of Russian President Vladimir Putin, Konstantin Kosachev, but it is not clear whether Mueller has evidence of such a meeting.

Koschahev was one of 24 Russian oligarchs slapped with U.S. sanctions earlier this month.

If such a meeting happened, it would be further evidence of ties between Trump associates and Putin. The dossier also claims that Cohen, among others, was deeply involved in a “cover up and damage limitation operation in the attempt to prevent the full details of Trump’s relationship with Russia being exposed.”

Neither Cohen nor Mueller commented on the story to McClatchy.

The report comes on the same day that U.S attorneys confirmed that they are investigating Cohen for criminal activity.

The FBI raided Cohen's office and home on Monday, in part on a referral from Mueller's office.