Peter Strzok, a veteran FBI counterintelligence agent, was removed from special counsel Robert Mueller’s team investigating Russian election meddling after the discovery of an exchange of text messages seen as potentially anti-President Donald Trump.

Justice Department officials are reading through “over 10,000 texts” between FBI officials Peter Strzok and Lisa Page, Fox News has learned, after it emerged Strzok was removed from Special Counsel Robert Mueller’s Russia probe following the discovery of anti-Trump messages between them.

Department of Justice officials told Fox News they are in the process of going through the texts so they can hand them over to the House Intelligence Committee.

Strzok, who was an FBI counterintelligence agent, had worked on the Mueller probe, but was reassigned to the FBI’s human resources department after the discovery of anti-Trump text messages with Page, with whom he was having an affair. Page was briefly on Mueller’s team, but since has returned to the FBI.