(CNN) The FBI is expanding its inquiry into sexual assault allegations against Supreme Court nominee Brett Kavanaugh beyond the initial four interviews that the White House directed to be conducted.

Two sources told CNN on Tuesday that more interviews are happening with a focus on other Kavanaugh high school friends who are listed as attending a July 1, 1982, party on the nominee's calendar.

The efforts come as anticipation builds for the FBI to deliver its interview summaries as soon as Wednesday to the White House and Capitol Hill. It was not clear that the extra interviews would prolong the process. The FBI had been directed to provide the summaries of their inquiries by Friday.

CNN has obtained the 1982 calendar entries submitted to the Senate Judiciary Committee by Supreme Court nominee Brett Kavanaugh. It was first reported by USA Today.

California professor Christine Blasey Ford has accused Kavanaugh of physically and sexually assaulting her at a party in the Maryland suburbs outside Washington, DC, when they were both in high school. She has said she doesn't remember the exact date of the incident and Kavanaugh has denied being at the party in question.

Tim Gaudette, who attended the July 1, 1982, party, talked to the FBI, his lawyer told CNN on Tuesday.

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