WASHINGTON—The White House has found no corroboration of the allegations of sexual misconduct against Supreme Court nominee Brett Kavanaugh after examining interview reports from the FBI’s latest probe into the judge’s background, according to people familiar with the matter.

It was unclear whether the White House, which for weeks has raised doubts about the allegations, had completed its review of the FBI interview reports.

Still, the White House’s conclusions from the report aren’t definitive at this point in the confirmation process. Senators who will decide Mr. Kavanaugh’s fate are set to review the findings on Thursday, and some of them may draw different conclusions.

(Update: Senators on Thursday begin reviewing FBI report.)

Sen. Chuck Grassley (R., Iowa), the Senate Judiciary Committee’s chairman, said on Twitter early Thursday that the committee had received the report.