Justice Department official Bruce Ohr arrived for a closed-door session before House lawmakers, but refused to answer questions shouted to him by Fox News chief intelligence correspondent Catherine Herridge.

Ohr is set to face a grilling from House Republicans on the Oversight Committee about his involvement with former British spy Christopher Steele, who compiled the salacious Trump-Russia dossier in 2016.

As he arrived for the hearing, Herridge confronted him with several questions, but Ohr did not respond.

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"Who authorized your contacts with the FBI?" Herridge asked, also inquiring about whether Ohr acted alone or had authority from a specific DOJ official.

The questions at the hearing are expected to focus on communications between Ohr and Steele, following recent revelations that they communicated extensively, even after the FBI dropped Steele as a source in November 2016 over his contacts with the media.

Rep. Darrell Issa (R-Calif.) told Fox News Monday that Ohr and his wife, Nellie, should admit they were part of a "conspiracy" to create a narrative of wrongdoing by President Trump.

Ohr's wife worked for Fusion GPS, which was hired by Hillary Clinton's campaign to compile the dossier of potentially damaging information against Trump.

Herridge also asked Ohr - who worked on narcotics and gangs - whether his wife benefited from the "dossier contract" and whether he had a conflict of interest.

Ohr sipped coffee, turned his back and walked away without answering.

Watch the video above and stay tuned to Fox News Channel for the latest developments out of the hearing.

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